[2] Special classes of crepuscular behaviour include matutinal, or "matinal", animals active only in the dawn, and vespertine, only in the dusk.
[5][6] Apart from the relevance to predation, crepuscular activity in hot regions also may be the most effective way of avoiding heat stress while capitalizing on available light.
Crepuscular flight activity is preferred by some animals, such as the walnut twig beetle, due to warmer temperatures, moderate wind speeds, and low barometric pressure.
This creates changes in animal sleep, reproduction, and foraging behaviours, often becoming less active during periods of low light.
Crepuscular animals are less likely to participate in typical foraging or reproductive behaviors and deal with increased stress and mortality rates when humans are present.
For example, Asian black bears may avoid areas with high human activity during the day, but go to these locations during twilight or nighttime hours.
[8] Many familiar mammal species are crepuscular, including the endangered Amazon river dolphin, some species of bats,[2] hamsters, housecats, stray dogs,[13] rabbits,[2] ferrets,[14] rats,[15] jaguars, ocelots, bobcats, servals, strepsirrhines, red pandas, bears,[16] deer,[2][17] moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, foxes, wombats, wallabies, possums[2] and marsupial gliders, tenrecs, and spotted hyenas.