The Drepanid family of moths are distinguished from all others due to their sense of hearing (which is why the family includes some groups that are dissimilar in appearance to the classic “hook-tipped” moth but related by this feature). The abdominal ears of drepanids are structurally unique compared to those of other Lepidoptera and other insects, by having an internal tympanal membrane, and auditory sensilla embedded within the membrane.
A beautifully fresh pair of hooktips discussing the next intimate step. The neighbouring curled leaf contained a recently vacated cocoon, so the assumption would be that the female (the larger of the pair at the top of the image) has recently eclosed and been detected by the more-likely-to-be-roaming male.
I left them to their amorous introductions and negotiations about meeting each other’s parents……
(Love it or hate it, Instagram has popularized the square photo format of the Kodak Instamatic and Polaroid era. As most of my subjects are longer than they are tall or taller than they are wide, it is not a format that usually suits. It does present very well however for a lot of moths at the sheet under the MV lamp, viewed from the dorsal aspect.)
Click on and scroll through individual images for IDs in captions.
Also known as the Masked Birch Caterpillar in its larval stage, the arched hooktip is a species of Hooktip moth (Drepanidae) that is native to North America, where it occurs from Newfoundland to Vancouver Island, south to South Carolina to the east and California to the west. Adults are often on wing from mid-may through late-July. Juveniles are known to associate with and feed on Betula, Papyrifera, and Alnus spp.