Monday, December 26, 2016

Midland Clubtail

Midland Clubtails are difficult to identify. I photographed this one in the Carleton College lower arboretum on 6 June 2016. Some of the field-marks are not visible in this photo. The underside of the third abdominal segment is white in the Plains Clubtail—it is usually yellow in the Midland, which tends to have narrower colored bands on the sides of its thorax. Midland Clubtails in our part of Minnesota tend to be quite variable. Our population is in a blend zone between a western and eastern subspecies, Gomphus fraternus fraternus and Gomphus fraternus manitobanus. Most our our Midland Clubtails have a yellow triangle on the top of their 8th abdominal segment. The 9th segment is variable, sometimes yellow, other times dusky, and can be black. In any event, this species is a voracious predator that often consumes other dragonflies.

No comments:

Post a Comment