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Crepuscular, a classification of animals that are active primarily during twilight, making them similar to nocturnal animals. Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night.
A number of factors affect the time of day an animal is active. Predators hunt when their prey is available, and prey try to avoid the times when their principal predators are at large. The temperature may be too high at midday or too low at night. [2] Some creatures may adjust their activities depending on local competition.
A kettle of Turkey vultures circle their prey over the Mojave Desert. A kettle is a group of birds wheeling and circling in the air. The kettle may be composed of several different species at the same time.
Voirin and Evans track the big cats on foot and by car, and film them hunting guanaco, feeding and playing at night. McGavin leaves Patagonia to investigate the mystery of a colony of vampire bats on an island off the coast of northern Chile. He locates the bat colony in a cave and attaches a radio transmitter to one of the animals.
The mean number of prey deliveries when the young are 6–10 days old is 2.4 per night, 1.4 when they are 11–15 days old, 3.6 when they are 16–20 days old and 2.2 when they are 21–25 days old. He will continue hunting until the young disperse.
Some ambush predators build traps to help capture their prey. Lacewings are a flying insect in the order Neuroptera. In some species, their larval form, known as the antlion, is an ambush predator. Eggs are laid in the earth, often in caves or under a rocky ledge. The juvenile creates a small, crater shaped trap.
More whales will then blow bubbles while continuing to circle their prey. The size of the net created can range from three to thirty metres (9.8 to 98.4 ft) in diameter. [ 6 ] One whale will sound a feeding call, at which point all whales simultaneously swim upwards with mouths open to feed on the trapped fish. [ 4 ]
[78] [155] Divers, diving ducks, penguins and auks pursue their prey underwater, using their wings or feet for propulsion, [69] while aerial predators such as sulids, kingfishers and terns plunge dive after their prey. Flamingos, three species of prion, and some ducks are filter feeders. [156] [157] Geese and dabbling ducks are primarily ...