Added Insects

by Carl Strang

It’s fun to discover new things, and at Mayslake Forest Preserve I continue to add new species of insects or plants almost daily in the summer. This week the most recent added insect was the question mark butterfly.

This species is named for the tiny silvery markings on the hind wings.

Last week this moth appeared, and I’ve seen another since.

The yellow-collared scape moth is a smaller relative of the similar looking Virginia ctenucha.

An abundant visitor of flowers in the stream corridor prairie this summer has been the great black wasp.

This solitary species digs tunnels, where it places katydids and grasshoppers for its young to eat.

A final new species remains to be identified.

One of the biggest weevils I’ve ever seen, this interesting looking insect turned up in one of the kids’ sweep nets on Take Your Kids to Work Day.

Of course, it’s also enjoyable to see familiar insects.

The wild indigo dusky wing is one of our more common skippers. I have seen them hanging around wild indigo plants at Mayslake, but their caterpillars also feed on other legumes.

Lately I’ve been seeing scattered slender spreadwings.

The pale vein at the tip of the wing, as well as the dark abdomen tip on this male, are distinguishing features.

Two bluets appeared to be large enough, and matching the correct color pattern, to identify as familiar bluets. First was a male.

The violet color seemed odd.

Later a female appeared.

She was feeding on another damselfly, which appeared to be a newly emerged forktail.

I owe thanks to Linda Padera, who accompanied me on a lunch break walk and spotted some of these insects.

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The American Snout, and More

by Carl Strang

One of my favorite animal names is “American snout.” It calls forth the image of some disembodied nose floating in space. In fact it’s a reference to a butterfly with a long forward extension of its head.

This butterfly was the first of its kind I have observed at Mayslake Forest Preserve. It is more common south of us. In references you may find its species name as carinenta or bachmanii; the genus is Libytheana, and there is only one North American species.

Another preserve first was this brightly colored beetle.

The milkweed leaf beetle, like so many consumers of milkweed, has bright orange colors. These warn potential predators of the possibility of poisons the insect may have sequestered from its diet.

I saw a couple bluets that had the relatively large size and the color pattern of familiar bluets.

The males had this violet coloration, though; my guess is that they had recently emerged as adults and would be changing colors soon.

I have been seeing more Virginia ctenucha moths than usual this year, at Mayslake and elsewhere.

That’s the way it is with some insects, having occasional years with higher numbers.

Of course, a major goal of all these adult insects is to find a mate and produce eggs.

For this pair of least skippers, it’s so far, so good.

On Friday I finally saw the first Peck’s skipper of the year.

The pattern of light spots beneath the hindwing is distinctive for this species.

It’s been a good year for insects, so far.

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