Metrioptera brachyptera

..the males do sometimes sing while moving around over more exposed patches of scrub (see DVD).

The males sing throughout the day, and will often sng in overcast conditions. Their song is a short chirp, repeated at a variable rate of 2 to 6 chirps per second. It is rather quiet, and for many people a bat detector is the best way of locating the males. [1]

References