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The World of Darkness
Whos Out There?
The Hours of Night
10 other sections not shown
able active at night adapted eyes animal's bat navigates bat's Biological Alarm Clock biological clock blind person blindfolded bats body temperature brain Bronx Zoo cage called cat's eyes color cone cells creatures Daniel Cohen day animals daylight hours daytime detect dim light dinosaurs ears earth echo echo-location system eight hours eyes of night Fireflies glow firefly flashing flying squirrel frog glands go to sleep Harker hear high-pitched noises hormones inside jungle kinesthetic sense kiwi layer of cells lightning bug look luminescent mals mammals mice migration millions of bats moth mouse move night animals nighttime nocturnal animal nocturnal birds nocturnal cockroach oilbird pattern of stars planetarium pupil r(anging red light reptiles retina rhodopsin rod cells Sauer scientists sensitive side skunk sonar specially adapted spend spring peepers starlight tapetum tiny tropical turned vampire bat visitors warblers whispering bats World of Darkness