Tuesday, September 29, 2015

Short-Winged Meadow Katydid

The Short-Winged Meadow Katydid (Conocephalus brevipennis) belongs to the family Tettigoniidae and the subfamily Conocephalinae which are the meadow katydids. There are 39 species of meadow katydids in the United States and Canada with 19 species in the genus Conocephalus. They are smaller, slimmer katydids than their cousins in the genus Orchelimum which also has 19 species , the last remaining katydid in this subfamily is the wingless meadow katydid (Odontoxiphidium apterum).

The short-winged meadow katydid is small at about 1/2 to 1 inch in length. What they lack in size they make up for in beauty. Their bodies are a kaleidoscope of of orange, brown, yellow, and greens. As their name suggests their wings are short and barely extend halfway down their bodies. Although there are a few specimens that will have longer wings that extend nearly to the tip of their abdomen.

Males have two little appendages at the tip of their abdomen (shown to the right). Females will have an ovipositor protruding from theirs that is used for depositing eggs in the ground after mating. By August these katydids have reached their adult-size and will begin calling for mates, singing out day and night. Eggs will overwinter in the ground and hatch in the spring. As soon as the ground warms in the spring the eggs hatch and the young katydid nymphs will emerge from the soil and begin feeding. These tiny offspring are almost mirror images of their adult counterparts.

You can find them in grasslands, prairies, meadows and other grassy or weedy areas, especially near swamps, creeks, and other damp areas. They are native to the Eastern and Central North America from South Dakota to Maine.





Friday, September 18, 2015

White-Lined Sphinx Moth

Sphinx moths go by many names, such as Hummingbird Moths, Hawk Moths and Hornworms. The one pictured here is called a White-Lined Sphinx Moth (Hyles lineata). They are an averaged sized sphinx moth with a wingspan up to 3 inches. This particular species is widespread and found throughout most of North America, Central America, West Indies, Eurasia, and Africa. White-Lined Sphinx Moths can be found in a wide variety of habitats, from desert, garden,and meadows, like most sphinx moths they are most active during dusk and nighttime hours. Although they will fly during the day as well. Mating between males and females usually takes place at dusk. Females will lay eggs on a wide variety of plants, which will include, but not limited to, Four O'Clock's (Picture #2), Willow Weed, Evening Primrose, Tomato, Elm, Grape, Purslane, Apple, and Fuschia. 


After reaching full size, like pictured here,  the caterpillar will crawl to the ground and burrow into a shallow depression in the soil and pupate. They will spend the winter in this stage. Massive population buildups occur which encourage them to head north and populate those regions.

Occasional outbreaks of these caterpillars have caused significant damage to tomato, grapes and garden crops in Utah. The adults nectar at a huge variety of flowers including Columbine, Petunia, Larkspur, Honeysuckle, Lilac, Wild Phlox, Moonvine, Jimpson Weed, Clovers, Bouncing Bet and Thistles. They are often attracted to lights at night, sometimes in large numbers. The whirring sound of their wings is what earned them their other common name of Hummingbird Moth. In Missouri there are probably two generations per year, with the last generation overwintering as a pupa.  


Sunday, September 13, 2015

Clouded Grasshopper

Autumn seems to be the season for grasshoppers. Tiny grasshopper nymphs hatch from eggs under the soil sometime in the spring or early summer and emerge from the ground looking almost like their adult counterparts. They of course are much tinier, and lack wings. They will eat and grow their way into mirror images of their parents by late summer and autumn. Agricultural areas, like where I live, seem to be host to a large variety of species and I am always coming across one I don't recognize, like the one pictured here. A very good friend of mine happens to be an entomologist and when I have "buggy" questions and need something ID'd I share images with him. He has tentatively ID'd this grasshopper as the Clouded Grasshopper (Encoptolophus sordidus). Another bug enthusiast thought perhaps it might be Encoptolophus costalis. So, once again I went to bugguide.net, the go-to for all things arthropod and submitted the image, and there is one response in favor of Eric's initial ID of Encoptolophus sordidus. We shall see if anyone else comments to dispute this finding and I will update this post as needed, but for now I am going to agree with the Clouded Grasshopper and thank Eric for helping me figure this one out.


I did a little research on them and discovered they have another common name of Dusky Grasshopper and they occur mainly in the Midwest and eastern United States and parts of Canada. They can be found in grasslands, prairies and meadows. The area where this one was found is on a small tall-grass prairie my brother-in-law has planted on one of our farms. 



This farm is full of Big Blue Stem, Indian Grass and other native species of sedges, grasses, wildflowers and forbs, needless to say the grasshoppers love it there. The preferred food of the clouded grasshopper seems to be grasses, wheatgrass, and sedges, but they will resort to forbs if hungry enough. In times of drought and extreme food shortages they are not beyond turning to cannibalism to stay alive. 


This species and
Encoptolophus costalis (The Dusky Grasshopper) were once considered the same species, which I assume is why the Cloudy grasshopper is still sometimes referred to as the Dusky grasshopper, which can get confusing if we resort to using common names alone. After some research, taxonomists have discovered there are enough differences between the two, that it is warranted to separate them into individual species. One main distinction is their geographic range. E. costalis is primarily a great plains species whereas E. sordidus range is further east. Their breeding habits are completely different as well. 

After looking at geographical maps of both species I am convinced more than ever that this species is E. sordidus, the Clouded Grasshopper. In John Capinera, Ralph Scott, and Thomas Walker's book "The Field Guide to Grasshoppers, Katydids & Crickets the range map for E. costalis does not include Missouri, so there you have it!




Thursday, September 10, 2015

Barn Spider

Orb Weavers, Orb Weavers, EVERYWHERE Orb Weavers! It seems every tree, bush, shrub, corn stalk and fence has some sort of orb weaver ensconced in a web busily hunting bugs and getting prepared to create the next generation.

Barn Spiders (Neoscona crucifera formerly N. Hentzii) are one of the most common orb weavers I find in my yard. I literally have dozens of these large females in various locations around the farm.

I found the web of the one pictured here before I actually found her! I walked right into the web and danced around like a maniac hoping the spider wasn't sitting on my shoulder. I'm not scared of spiders but the thought of a large spider hanging out on my person without an invitation, freaks me out! Luckily she was hiding among the leaves of the tree where the web was hanging from. I pulled down the branches to get a better look at her and decided to photograph her. She was a fairly tolerant photographic subject and posed quite nicely for me.

Neoscona crucifera have many common names, including Barn Spider, Hentz's Orbweaver, Dotted Orbweaver and just Orbweaver. The genus name of Neoscona loosely translates into "Spinning among the reeds" and was first described by Eugene Simon, a young French Arachnologist. The species name of crucifera probably refers to the faint cross or crucifix pattern that is visible on the abdomen of many specimens. This species is somewhat variable in coloration, but typically they are beige or rusty orange with banded spiny legs. Males are smaller than females with much longer legs.

Males seek females in the late summer to mate with. Once a female is encountered he will cautiously approach the web and tap out a series of unique moves that identify him as a mate and not a meal. With any luck the female will be in the mood for mating and not dining. If mating is successful she will form an egg sac and place it in a rolled up leaf to help conceal it from predators.
Mating pair, male on the right

 Each egg sac may contain up to a 1,000 eggs. That sounds like a lot of spiders being unleashed on the environment once they hatch in the spring. But the reality is they won't all survive. Many will be preyed upon by insects, birds and other critters that savor tiny spiders. Mud daubers are especially fond of orb weaver spiderlings. I would imagine the percentage of surviving spiders is very low, certainly no where near 100%. The spiderlings will remain clustered together for several days after leaving the shelter of the egg sac. Some may balloon themselves on wind currents to distant locations, others will remain near the area where their mother gave birth to them.

Even as tiny spiderlings they are capable of building elaborate webs that are mini versions of the ones they will create as adults. As adults the webs are much larger, up to 2 feet in diameter at the center with support lines attached to nearby vegetation, or buildings. They will often build near porch lights, one could assume these are the lazy (or smart) hunters. Lights attract bugs, and webs catch bugs---what a perfect set-up.
Webs are built at dusk and in the morning the female will consume the web. Eating the web provides extra protein for egg production in the form of tiny insects that are too small for her to wrap in silk and consume otherwise. She also recycles the silk to reuse later. Silk is a precious commodity that requires a lot of energy to produce, so it only makes sense to conserve what they can.

This species is one of the most wide spread of all the orb weavers. They are found throughout Eastern North America, and as far west as California, as well as Mexico. Like all spiders they have venom, but the venom is harmless to humans. It is designed to subdue and partially dissolve their prey. They rarely come in contact with humans so bites are extremely uncommon, and usually only occur if they are mishandled or if somehow caught in your clothing (when you accidentally walk into a web). If you are bitten it may sting, itch and look a little red for awhile, but is not known to be medically significant. The benefit of these spiders far outweighs any negative feelings we may have towards them.


Wednesday, September 9, 2015

Two-Striped Planthopper

This time of year tiny leafhoppers, treehoppers, planthoppers and other "hopping" insects seem to be everywhere. Many of them blend in with their surroundings with perfect camouflage in shades of green, brown and combinations of both. This can make them somewhat difficult to see, but if you stand still for a minute and look carefully you will spot one without much trouble. They will often scurry to the other side of a twig, leaf, or blade of grass as soon as they spot you, or they may simply hop away disappearing from view. This strategy works in their favor to avoid any predator that might want to feed on a tiny hopping bug.

The one pictured here is the Two-striped Planthopper (Acanalonia bivittata) and they are considered the most common of all planthoppers in the United States. Worldwide there are 63 species within this genus, 18 of them are found in the United States. They are almost always green with a reddish-brown stripe along the inner edge of the wing. Occasionally you may find a pink specimen. They measure 1/4 to 15/64 inches in length (3 to 6 mm).

They are found throughout the Eastern United States feeding on woody, or herbaceous plants. Look for them in grasslands, woodland edges, open fields and on the leaves of trees.  They rarely occur in large enough aggregations to cause significant damage to plants.

Nymph

Mating probably takes places in late summer or early fall and the female will use her sharp ovipositor to slice into twigs or the stems of many of the plants they feed on, like blueberries for instance. She will lay her eggs within the slit she creates and the eggs overwinter. When spring arrives the eggs hatch and the nymphs superficially resemble their parents. They reach the adult stage by late summer and the cycle will begin again. 





Thursday, September 3, 2015

Prairie Vole

Are you wondering why I am featuring a mammal on an insect blog? Just look at this face how could I possibly resist sharing? Plus, they eat insects, so it ties in with the blog theme right?

This adorable little rodent is a Prairie Vole (Microtus ochrogaster) and they are common throughout the midwest. This one was caught in a live trap for rats and wasn't smart enough to figure out he could fit through the holes in the cage. I thought about feeding it to my pet snake, but I just couldn't bring myself to do so because it was too cute. I let it go and it ran into an old pulley we had laying on the porch. I managed to take a few pictures before I placed it inside an old bird house.

Prairie Voles are found in dry, grassy areas where they dig tunnels and burrows that they are quick to retreat to when alarmed. They are known to live in family units and many individuals may share the same burrow and tunnels. They are also known to be monogamous which is unlike most other voles, or even other small rodents like mice for instance. After prairie voles mate, the male will remain by the females side for a period of at least 24 hours then they will become a mated pair and remain together for the remainder of their lives, which is short at about 2 years (if they aren't eaten first). This relationship does not seem to be based on sex, but rather a social behavior, They will groom, cuddle and touch each other continuously while together and share in rearing their offspring. Mating takes place in the spring or fall and about 25 days later she will give birth to about a 1/2 dozen hairless, blind babies. Litter size is dependent upon food sources available. Less food=smaller litters.  She may have up to 4 litters a year. If the females is killed, the male generally does not seek another life partner. Even though they are "monogamous" they will upon occasion seek a little somethin-somethin on the side and mate with an available sexual partner, but will not pair bond with that mate.

The young open their eyes at about one week of age and by two to three weeks are self sufficient. Females are able to reproduce by 40 to 45 days of age. Like all small rodents or rabbits, they reproduce often, and reach maturity at a rapid rate. They are important prey items for many wild animals including snakes, owls, hawks, coyotes, foxes, raccoons, etc. Some consider them a pest because they will get into gardens and feed on seeds, produce and other plants. They will also consume some insects, but seem to prefer vegetation. They may feed on stored grain, but overall the benefit outweighs any negative aspects attributed to these tiny rodents. If however you decide to use poison baits to remove them, be aware that any poison they ingest will make its way into the food chain. The poisoned vole, will be eaten by an owl and consequently the owl will be poisoned. Most of the time if you are tolerant of the predators such as snakes, coyotes, etc they will take care of any voles that are hanging around your garden. Nature has a way of balancing itself if we let it.


In 1994, in Pulaski County, MO a single Prairie Vole was found to be a reservoir for a disease uniquely described to them called Bloodland Lake Virus which is a type of Hantavirus. It was later found in voles in St. Louis County, MO. Hantavirus is a very serious disease spread through the droppings of rodents and bats to humans. High concentrations of virus laden excrement can dry out and the dust off this waste can become airborne and be inhaled by humans. Hantavirus is rare, but can be fatal. While the prairie vole has been shown to harbor this virus in its system there has been no transference to humans to date. All reported cases of Hantavirus in humans have been traced back to bats, mice and rats. I find it fascinating that these little guys carry such a potentially life threatening virus in their system, but it has not found a way to infect humans. Maybe it is largely due to the fact that voles don't generally share our dwellings like other rodents and even bats can and will. We are far more likely to come in contact with these other carriers than with a vole.

They are active year-round and do not hibernate. They will create tunnels in the snow to travel back and forth to burrows and food stores. They will cache food for the winter such as berries, nuts and seeds. During the warmer months they are primarily nocturnal and are rarely encountered in daylight hours.

This little vole was fed an apple wedge and sent on his or her way to continue reproducing and providing necessary nutrition to all the wildlife living in our area.


Wednesday, August 19, 2015

Black & Yellow Garden Spider

Black & Yellow Garden Spiders (Argiope aurantia) are found throughout the United States and are one of the most commonly seen spiders in Missouri. They build elaborate webs at the edges of field and meadows or crop ground which earned them another common name of Corn spider. You may also find them in their webs on the eaves of your home, or on your porch railings. Also look for them around outbuildings.

Their webs are unique structures measuring up to 2 feet in diameter with a stabilimentum running up the middle in a zig-zag pattern. There are differing opinions as to the purpose of the stabilimentum. Some researchers feel it may be a form of camouflage that aids in hiding the spider as it rests upside down in the center of the web. Others feel it acts as a lure of sorts to attract insects to the web and still others feel it may be a deterrent for birds to keep them from flying into the web and destroying it. I've even read that it may act as a stabilizer to strengthen the web and keep it from being completely destroyed by the large insects these spiders favor. Bugs like cicadas and grasshoppers struggle quite a bit when tangled in sticky webbing and can easily wipe out a well constructed web. Only spiders that are diurnal have stabilimenta at the center of their webs. So it must have something to do with other things that are also active during the day.

At the end of each day they will consume the center portion of the web, leaving the radial line that the "orb" is attached to. It may be that she consumes the web for the extra protein available from the tiny insects caught in the webbing. Or perhaps its just because webbing is a pricey commodity to create and conserving it only makes sense.

Female
Males are much smaller than females and only measure up to .35" whereas females measure up to 1.10". Males will roam around seeking females to mate with, when he finds a likely candidate he will sit at the periphery of her web and use his front legs to "tap" out a dance of sorts that she will recognize as a possible mate and not food (if he's lucky). Once mating has taken place the male will die, having lived for the sole purpose of mating. She may consume him at this point for extra protein.
Male

She will begin laying eggs on a thin sheet of silk, then cover them with another layer of silk. Then she wraps this all up in another layer of brownish colored silk that she will form into a sac with her legs. She is capable of laying up to 4 egg sacs containing up to 1,000 eggs within each sac. She usually places the sacs at the center of the web where she hangs out. This allows her to guard the egg sac until she dies, which usually happens when the first frost arrives. The egg sacs overwinter and hatch in the spring. The spiderlings will "balloon" to new locations and build their own webs. Many of them will be predated on by other spiders, insects, birds, frogs and other creatures fond of tiny spiders. So even though a single female may produce up to 4,000 eggs, only a small percentage of them will survive to adulthood.


Humans have little to fear from these strikingly beautiful spiders. They are not known to be harmful to humans. Bites are only likely to occur when you grab one or mishandle one. A bite is reported to be no worse than a bee sting. If you have allergies to bee venom or other insect venom, then a bite from one could be medically significant and you should seek help.

Garden spiders are extremely beneficial to gardeners and farmers alike. They feed on harmful insects like crickets, moths and grasshoppers, controlling their populations and protecting your plants and crops from the voracious feeding habits of those insects. Not to mention watching them construct their web each morning is a fascinating thing to see. They should be welcomed to live in your garden and appreciated for the help they are providing, free of charge.





Thursday, August 13, 2015

Orchard OrbWeaver

What these spiders lack in size they more than make up for in absolute beauty. The Orchard Orbweaver (Leucauge venusta) is without a doubt one of the most stunningly gorgeous orb weavers in Missouri. They belong to the spider family, Tetragnathidae , which are the Longjawed Orbweavers. This species has exceptionally long legs, especially the front two pairs, which makes them look an awfully lot like long-jawed orbweavers that they are closely related to, and which it is sometimes called. Like most species of spiders females are larger than males. Spiders are never measured in terms of legspan, but rather body length. Females may reach lengths up to 5/16ths of an inch, and males are smaller at 5/32nds of an inch. The background color of the abdomen is creamy or pearly with a series of yellow, black and orange lines running down the length. There is a sheen to the abdomen, almost a metallic look.


Look for them in low hanging shrubs, bushes and other plants especially in moist woodlands or wetlands. Like most orb weavers they build elaborate webs up to a foot in diameter for capturing insects. Spiders within the family Tetragnathidae build webs with a hole at the center where they will "Hang out" waiting for prey to fall  or fly into the web. You will usually find them hanging upside down and with their back facing the ground, so they will be placed on the underside of the web. This exposes their belly for viewing and sometimes causes them to be mistaken for black widows, which I find amazing. But, I guess if you see a reddish or orangish marking on the belly of a spider your first thought might be widow!

Mating takes place in late spring or early summer and the female will create an egg sac and deposit several hundred eggs within. She may place the egg sac at the edge of her web within the bush or shrub where she lives or she may attach it to a branch or twig. She will die by the end of the summer.  The egg sac will overwinter and the spiderlings will emerge from the sac in the spring and the cycle will begin all over again.


This is thought to be the only spider named by Charles Darwin, who we know to be the person behind the theory of evolution. The genus name of Leucauge in Greek translates to *with a bright gleam* and combined with the species name venusta which is Latin for elegant, beautiful or charming makes for a very apt name for these spiders. Although I'm not sure if spiders can be charming or not, but as evidenced here they can certainly be beautiful.

Like many spiders they will retreat when they feel threatened. Some will follow a drag line made of silk to a safe hiding spot somewhere near the edge of the web in some shrubbery, this species often drops completely to the ground to hide among the leaf litter. While this can make them somewhat difficult to find, taking a little time to search for them is well worth it to be awarded a closer look at the spectacular species.




Monday, August 10, 2015

Two-Spotted Longhorn Bee


Male
One of my favorite bees are these tiny little bees that I always refer to as the "napping bees" because every time I find them they are grasping blades of grass, or stems of plants with their manibles and appearing to be snoozing. I find them frequently, but didn't know  what they were. I asked Eric Eaton for help on identifying these adorable little bees and very quickly he replied that they are Two-Spotted Longhorn Bees (Melissodes bimaculata). Then when I began working on this post,  I discovered I had written a post about them many years ago. I had completely forgotten this entry to my blog, and what I had learned at that time about the ID of these bees. The ironic thing is....I had asked Eric at that time to ID them! My only excuse is that it was 6 years ago....or maybe I am just getting old and forgetful.

If you'd like to learn more about Eric and his passion for all things buggy please visit his wonderful blog Bug Eric

There are 119 known species within the genus Melissodes, and most species are solitary ground nesters and will dig a burrow within the soil and line it with a wax-like substance that they secrete. This habit of digging their burrows earned them the common name of Digger Bees. A few species within the genus are communal and will nest in small community nests.  Cuckoo wasps with the subspecies of Triepeolus use the offspring of these bees as the host for their own offspring. Being a solitary nester means you have no family to protect and therefore not prone to being defensive.....there is nothing to defend. This is unlike Honey bees or bumbles bees which guard honey stores, offspring and a queen.

Honey bee hives may contain upwards of 40,000 individuals, nearly all of them females that provide food for the adult hive members, as well as the offspring of the queen. They also care for the queen since her only job is to lay eggs. These little workers also guard the hive from invaders, clean the hive, air condition the hive, and communicate with the colony where food is available and how to find it. They have a very complex lifestyle and much to lose should the hive become threatened, so it stands to reason that they would be somewhat defensive near the hive. However, when they are out foraging for food they rarely sting unless provoked or accidentally stepped on or grabbed. 


The little digger bees got the name longhorn from the long antennae the males possess which are much longer than most bees. For those who are familiar with these bees this is apparently a great way to identify them. This particular species also has two yellowish-white spots near the tip of the black abdomen. These two spots earned them the specie name of bimaculata, which means translates into *bi* (Two) *Macula* (Spot). 
They also have long yellowish colored hairs on their hindlegs. Females are approximately a 1/2 inch in length, males are a bit smaller at 3/8 of an inch. 


Female
The adults of these bees seem to prefer plant nectar from daisy's, asters and coneflowers. They are a very common sight in the mid to late summer months. I have a tremendous amount of coneflowers in my gardens which must be why I see so many of them in my yard.





When evening nears and the sun is riding low on the horizon slowly walk along the plants and flowers in your yard, or a nearby field or meadow and you might spot these little bees tucking in for the night.




Friday, August 7, 2015

Common Water Strider

Water Striders are unique, and interesting insects that are often found skimming across the surface of the water in lakes, ponds, rivers and streams. The one pictured here is the Common Water Strider (Aquarius remigis), and is possibly the most common water strider found throughout North America, especially in the Midwest. Many people refer to them as water spiders, however they are not arachnids at all, but rather true bugs in the order Hemiptera and family Gerridae.

Have you ever visited a clear stream and noticed shadows passing across the pebbles and debris on the stream bed? Those moving shadows are often the first thing you see of these insects. Upon closer inspection you will see the insect causing those shadows as it moves across the water. Striders have specialized hairs on their legs that help them repel water, which allows them to glide (or stride) across the surface of the water. Their bodies have velvet-like hairs covering them which also repels water keeping them dry despite the fact that they live an entirely aquatic life. 

This is a fairly large species with body lengths up to 3/4 of an inch, but with their elongated legs they look much larger, nearly the size of a quarter in diameter. Their bodies are dark brown, or black and the margins are white. All the literature I read claims the adults generally lack wings, so I assume this means there are a few individuals that may be able to fly.

To find mates they will send ripples across the surface of the water that other striders will recognize as a potential partner. After mating, females will lay eggs on the rocks, logs, water plants or other items in the water. After a few weeks the eggs will hatch and the nymphs look almost identical to the adults only much smaller. After several molts they will reach adult size and sexual maturity. Once mating season is over they will often congregate in large groups all randomly moving in circles. If disturbed they will scatter and hide in cracks, crevices or other secluded areas away from danger. Birds are fond of eating water striders and will often prey on them. Given their aquatic life, you might assume fish would eat them. This however does not seem to be the case as fish rarely consume them. Maybe they give off a defensive substance that fish find distasteful.

Water striders, like many true bugs are predators and feed on other insects and spiders. They have sucking mouthparts and specialized enzymes in their saliva that aid in paralyzing and partially digesting their prey. Bugs and spiders that happen to fall into the water are quickly targeted and consumed by striders. If it is a particularly large prey item, several striders may share, like a communal meal. In the case of smaller prey items they will often fight to keep their meal or run away quickly when another strider approaches. Which is what the one pictured here did. Several other striders attempted to take her insect from her and she wasn't having it! She spent 10 minutes running from place to place to avoid other striders, before finally being able to enjoy her meal in peace. They are also known to feed on mosquito wigglers, which makes them hugely beneficial to humans. After all none of us likes mosquitoes!

Even though they are harmless to humans, a bite from one of these would be a somewhat painful experience. Like most true bugs that piercing mouthpart they use to capture and kill insects can also pierce human skin and the enzyme in their mouth can cause irritation at the bite site which might result in itching or redness. 

I can't think of much I enjoy more than sitting on the shore of a crystal clear stream, and listening to the birds singing, and feel the cool breezes blowing off the water and watching the water striders skate across the surface of the water with no particular place to go.