Adapted from Jim Conrad's
Naturalist Newsletter of March 31, 2007
issued from Sierra Gorda Biosphere Reserve,


That's its English Name -- "Giant Katydid," as opposed to the usual North American just-plain "Katydid" or "Common True Katydid." You can see the Giant Katydid I found this week hanging on the Reserve's bathroom door and then transferred to the woods below:


You might enjoy seeing if you can spot how it differs from the "Common True Katydid" found in much of eastern North America, shown at

One big difference is noticeable in the architecture of the back area just behind the head. In bug classification, such differences mean a lot. Our giant species is about three inches long.

Anyway, this Giant Katydid I'm talking about is STILPNOCHLORA COULONIANA, a member of the "False Katydid Subfamily," the Phaneropterinae, not the "True Katydid Subfamily," the Pseudophyllinae. To see a list of over 350 katydid types found north of Mexico, each species name linked to picture, go to

If your computer can digest WAV files (most PCs can) you can hear our Giant Katydid stridulating at

Compare that to the "Southeastern Common True" call at

What a treat to see this tropical, Mexican variation on the Yankee species I grew up with!