Friday, October 12, 2018

Remembering National Moth Week 2018

A tiger moth, Apantesis sp., from Lyons, Colorado, July 22.

Today it is cold, foggy, and there is still some snow leftover from yesterday here in Colorado Springs. What better time to look back on warmer times and the insects that could be found back then? National Moth Week this year was July 21-29. Despite the fact there was a full moon during that period (the worst possible conditions for putting out a blacklight because the lunar light is literally superior competition that nocturnal insects navigate by), we had very interesting results along the Front Range.

A leaf blotch miner moth, Caloptilia sp., from Chico Basin Ranch on July 21.

As has been the case for at least three years now, the Mile High Bug Club sponsored and executed local events during National Moth Week. Weather conditions varied considerably, as that time of year represents our season of almost daily storms, but we persevered and accumulated good data sets from casual observations and imaging. We posted most of our images to iNaturalist, and anyone can search by location and date for the results.

This large Carolina Sphinx moth, Manduca quinquemaculatus, showed up at Chico Basin Ranch on July 21.

For the second year in a row we kicked off the week on Saturday, July 21, at Chico Basin Ranch, a sprawling 80,000+ acre parcel that straddles the El Paso and Pueblo County line. This year we were again on the El Paso County side, setting up our lights at the bird banding station composed of a building and a nearby barn.

Emerald geometer moth and friends, Chico Basin Ranch

Almost immediately we attracted moths, beetles, true bugs, flies, and other insects to our blacklights and mercury vapor light. Thanks to being located well away from water, we were not inundated with caddisflies, variegated mud-loving beetles, and other aquatic insects like we were last year; so, the night was much more comfortable and we did not inhale any insects accidentally, nor take that many home in our vehicles.

Rufous-banded Crambid moth, Mimoschinia rufofascialis, Chico Basin Ranch

Insect diversity in general was very good, in a year in which overall insect abundance has been exceptionally low. The diversity of habitats at the ranch, most natural and some man-made, has much to do with the biodiversity of insects, birds, and other wildlife found there.

An owlet moth, Grotella septempunctata, from Cheyenne Mountain State Park, July 24.

Our second of four events was on Tuesday, July 24, at Cheyenne Mountain State Park, just south of Colorado Springs off of Highway 115. The park always welcomes us and adds our events to their schedule for the campers in the park to enjoy. Indeed, we had a respectable, if brief, turnout from visitors. Many families had children that were either up past their bedtimes already (especially those from different time zones), or were easily bored, or both.

Ilia Underwing moth, Catocala ilia, from Bear Creek Nature Center, July 27.

Our third event was Friday, July 27, at Bear Creek Nature Center in Bear Creek Regional Park, and it included a presentation on moths by yours truly. We had a very good public turnout, but the weather was absolutely miserable. At least the rain stopped by the end of the talk so that we could deploy our lights on the deck out back. Thankfully, a large underwing moth made an appearance, and even stayed long enough for everyone to get a look. Most of the other moths were small and difficult to see on the stucco-textured exterior of the building.

Artichoke Plume Moth, Platyptilia carduidactylus, at Bear Creek Nature Center, July 27.

We were back at Cheyenne Mountain State Park for our concluding event on July 28. Once again we had questionable weather, and zero attendance from the public. Still, if you light it up, they (moths) will come, and that night was no exception.

Jaguar Flower Moth, Schinia jaguarina, at Cheyenne Mountain State Park, July 28.

My wife and I also took a weekend trip to Lyons, Colorado, north of Boulder (northwest of Longmont), July 22-24. We stayed at Stone Mountain Lodge and Cabins, and did our blacklighting there. The wooded area, with cliffs rising above the lodge, along with landscape trees, shrubs, and plants, supported quite a diversity of moths and other insects, even given the unseasonably cool, damp weather.

A twirler moth, Aristotelia sp., from Lyons, Colorado on July 22.

Next year, Mile High Bug Club may opt to do fewer events during the designated National Moth Week to avoid stormy weather. Here along the Front Range we seem to have two peaks in moth diversity and abundance: One in mid- to late June, the other in about mid-September. Obviously, one goal of the national event is to remain consistent in the timing and location of observations to note trends in abundance and diversity over time. That may not always be a true reflection everywhere, though. The chief goal of our bug club events is to simply recruit new members of the public to an appreciation of the butterflies of the night.

Owlet moth, Andropolia theodori, from Lyons, Colorado, August 23.

1 comment:

  1. OMG, you have a lot of lovely moths! That green Geometridae looks similar to what we have here too. But that leaf blotch miner looks like a high heeled shoe, i wonder if it mimics something like that! I am a member of our Philippine Lepidoptera Group in Facebook and i enjoy monitoring our butterflies and moths. I am now addicted.

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