Nothing Special   »   [go: up one dir, main page]

Showing posts with label Ambush Bug. Show all posts
Showing posts with label Ambush Bug. Show all posts

Wednesday, June 13, 2012

Indian Hemp Insects

Indian Hemp, Apocynum cannabinum, is just beginning to bloom.  This plant is one of the first stops for newly emerged Edwards’ Hairstreak butterflies, so I hung around the patch for a few minutes to see if any butterflies were active.  No butterflies yet, but there were plenty of other interesting insects.

The most numerous species was a firefly.  I believe this is Pyropyga decipiens.  This is not one of those species that blinks through the air on warm summer evenings.  Its light producing capacity is more subdued.

I don’t know much of the life history of this species, but this posture must be significant.  Most of the specimens I saw were assuming this same position.

This might be some sort of mating display.  These shots were taken about half an hour before sundown, so this might be a way of exposing its light signal to potential mates.

A Click Beetle had itself wedged between leaf and stalk.  Not a very effective camouflage, but these beetles are pretty well protected from most small predators.

Several brown leafhoppers rested on the stems, although none of them appeared to be feeding.  Leafhopper identification can be a challenge.  There are a staggering number of species along with a bunch of newly discovered species awaiting names and others waiting to be described.  It’s also possible that some of the colorful common species have look-alikes that cannot be separated without strong magnification of hard to find parts.

As the flowers open to attract insect pollinators, predators gather to take their share of the visitors.  Hidden among the flower buds, a small spider is feeding on a fly not much smaller than itself.

Ambush Bugs are already mature and ready to tackle the larger insects coming in for nectar.

Several Soldier Beetles, Chauliognathus marginatus, were moving among the plants.  Adults of this species feed primarily on pollen and nectar.  This one seems to be living up to its name by issuing commands to the rest of the troops.

When you see leaves stuck together, it usually means that there is something living inside.

The leaves were stuck together by webbing created by this larva.  Most of the feeding activity was directed toward the new growth trapped between the two leaves.  I’m not sure what the larva will look like in its adult form.

I try not to be too disruptive in my investigations, so I used a make shift clothes pin to reclose the leaves.  The larva will most likely relocate as a result of this disturbance, but at least I didn’t leave it exposed to the next hungry bird that flew by.

Friday, July 1, 2011

Common Milkweed Creatures

I began the week with a look at various animals on one type of milkweed, so I thought it appropriate to finish the week with a look at creatures inhabiting another type of milkweed. Common Milkweed is widespread, but it seems to prefer soils towards the moderate to wet end of the moisture scale. The flowers usually don’t form the dense cluster typical of other milkweed species and their tendency to droop detracts from the visual effect. It’s still a powerful attractor of insects and other small creatures.


Continuing with the black and orange theme of milkweed dependent insects is a pair of Milkweed Beetles.


It seemed to be a time of interaction for the creatures of the milkweed plant. These Milkweed Beetles are doing their best to ensure a future supply of beetles. In fact, I didn’t find any single beetles on any of the plants I visited.


Ambush Bugs were also busy starting a new generation. Mating insects are a little slower to move to cover when disturbed, so make good photographic subjects.


The flower clusters were full of small beetles and showed many signs of feeding damage.


Where ever insects congregate, you’ll find predators. That’s certainly an impressive set of spiny legs. I wonder if the spines serve as some sort of sensory device.


There was also a lot of interaction between different species. The beetle fled a flower cluster as I was pushing the plant around to get a good picture. The spider was quick to take advantage of the opportunity.


I’ve pretty much learned what to expect when I see a butterfly acting strangely on a flower. Edwards’ Hairstreaks move about almost constantly when nectaring. If you see one holding still, you know there’s something wrong.


Just as I suspected, a crab spider. This sort of activity goes on all the time, but I hate to see the rare things being killed. I hope it took care of mating and egg laying before it came over and got itself eaten.

Wednesday, September 8, 2010

Great Lobelia with Insects

This is sort of a slack time for flowers at Blue Jay Barrens. The summer bloomers are finishing and the fall asters and goldenrods have just begun. The Great Lobelia, Lobelia silphilitica, is a species that tends to bridge the gap and provide a strong nectar source during early September.

Tiny bees have swarmed to these flowers, but most have been drinking nectar through cuts at the base of the flower instead of crawling inside.

There is a slit down the top of the bloom that reaches to the base, but it’s not normally open enough to allow nectar to be extracted. Some of the bees seemed to be chewing to create an easier access point.

Other bees actually entered the flower in the more traditional manner. It seemed to be a struggle for most of them to squeeze inside, so perhaps the difficulty of squeezing in through the front of the flower acts as encouragement to try the alternate method.

The temporary shortage of flowers has caused some predators, such as this Ambush Bug, to heavily invade the Lobelias. This bug hunts by hanging around flowers to capture visiting nectar feeders.

Maybe this is why so many bees were trying the backdoor approach to feeding here. The Ambush Bug grabbed this bee with its hooked foreleg and quickly pulled it behind the petal. The bees greatly outnumbered the Ambush Bugs, so I’m sure the bee population won’t suffer too much.

Wednesday, April 7, 2010

Leatherwood

The woodland understory is beginning to brighten with the blooming of the native shrubs. This is the bloom of the Leatherwood shrub, Dirca palustris. Not a showy bloom, but when all else is brown, a little bit of yellow really stands out.

Leatherwood is an attractive shrub that grows in shaded situations. A tall specimen might reach ten feet. I’ll bet it would make a really nice landscape plant, although some people have an allergic reaction to the bark and the fruit is said to be a narcotic. I’ll collect some seed this fall and see if I can grow some seedlings to plant around the house. Maybe I’ll learn more about the reported narcotic properties of the fruits.

The leaf bases completely surround the bud, so the next year’s growth seems to emerge from a collar formed by the old leaf scar. This makes some of the branches look as if they had been put together from an old box of spare parts.

These early leaves have a lovely mat of hairs on the back side. The hairs look almost like coconut husks. The older leaves lack this thick pubescence.

I’m always interested in what pollinates the flowers. There were a number of small bees visiting the flowers, but I was having trouble getting close enough to any for a good picture. Finally, after an agonizingly slow approach, I got within range of this fellow. Then I found out why I was so successful. An Ambush Bug has already immobilized the bee for me. I saw more ambush bugs last year than I have in the last 10 years. This may be another bumper year.

Saturday, July 25, 2009

Ambush Bug

Three weeks ago I posted about a Bumble Bee that I found hanging by its mandibles from a flower. Now I’ve found a second bee, a Honey Bee, in the same position. This bee is dead, or at least completely unresponsive, according to the standard poke-with-a-stick test.

Maybe this is not an uncommon end for a bee. It’s just something I’ve not encountered before, and now I’ve seen it in two species this month. I’ll just have to pay attention and see if I can spot some more.

But, enlarging a digital image allows me to see things I could never see in the field. Look to the left of the bee’s eye. That’s not a plant part. That bee has been snared.

Although this isn’t the best of images, I believe this to be an Ambush Bug, of the family Phymatidae. The Ambush Bug hides in flowers and captures prey that is considerably larger than itself. Its coloration is a perfect match for this milkweed flower.

Here is a rather unfocused image of the entire bug. Quite an impressive job of camouflage. It’s hard to focus on something when you don’t even realize it’s there.