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Lesser Angle-winged Katydid
The Lesser Angle-winged Katydid (Microcentrum retinerve) is a common late-summer and early-autumn inhabitant of treetops.  Males like this one are recognized by the brown spot seen dorsally just behind the head.  Most active at night, they are sometimes attracted to artificial light.  But owing to their affinity for arboreal life and their superb leaf-like camouflage, these and other katydids are more often heard than seen.  The song of the Lesser Angle-winged Katydid is a set of two or three rattles given in quick succession and repeated at one second intervals.  In response to decreasing temperatures during the fall, the song becomes progressively slower and the interval between sets of rattles increases.  A hard frost ends the chorus for the year.