They use sound (see echolocation) to detect small ripples in the water created by fish or fluttering insects on the surface.
Conceive of nature as basically the charismatic mammals and plants, plus a few pretty fluttering insects, and perhaps it's hard to see our place in it.
Marren, a keen naturalist, understands such sinister representations of collectors, however: "It could be considered obsessive, narrow-minded behaviour, and it features death and clinical things such as gas [in jars to kill them], shiny pins and helpless fluttering insects – you could easily make a nightmare out of it.
One research team has determined that the nervous system of a dragonfly displays an almost human capacity for selective attention, able to focus on a single prey as it flies amid a cloud of similarly fluttering insects, just as a guest at a party can attend to a friend's words while ignoring the background chatter.
Maybe it's the act of running after pretty fluttering insects with a net that just keeps anyone from taking themselves too seriously".
These bats find their prey by detecting and localizing rustling sounds from walking or fluttering insects in vegetation or on the ground [15] [17].
Thus, the long CF calls emitted at a high duty cycle, together with Doppler shift compensation and the auditory fovea allow horseshoe bats to detect fluttering insects in cluttered space (reviewed in [ 60]).
While some species of bats get around this problem by listening for faint sounds made by prey, such as mating calls or the fluttering of insect wings, a number of bat species have found a way to detect entirely motionless prey using echolocation.
In the late golden sun, the flutter of insect wings filled the air with sparkling light.
The cor anglais has a repeating, insistent presence (beautifully played by Dominik Wollenweber); strings divided into several, closely pitched layers flutter like insect wings; a high wood block issues a repeated, three-note command.
