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A small prey animal can be killed by whiplash as the predator shakes its head. [128] When foraging for fish in shallow water, caiman use their tails and bodies to herd fish [48] and may dig for bottom-dwelling invertebrates. [40] The smooth-fronted caiman will leave water to hunt terrestrial prey. [36] A gharial eating a fish
Animal navigation is the ability of many animals to find their way accurately without maps or instruments. Birds such as the Arctic tern , insects such as the monarch butterfly and fish such as the salmon regularly migrate thousands of miles to and from their breeding grounds, [ 1 ] and many other species navigate effectively over shorter ...
Matutinal animals are active only after dawn, and vespertine only before dusk. 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]
Nonmigratory bird movements include those made in response to environmental changes including in food availability, habitat, or weather. Sometimes, journeys are not termed "true migration" because they are irregular (nomadism, invasions, irruptions) or in only one direction (dispersal, movement of young away from natal area).
Camels got better at closing their noses to keep out sand and lock in moisture. They learned to drink saltwater, eat toxic plants and position their bodies in the coolest possible angles to the sun.
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 ]
They remain in warm water only long enough to obtain food, and then return to cooler areas where their metabolism can operate more slowly. [31] [32] [33] Alternatively, organisms feeding on the bottom in cold water during the day may migrate to surface waters at night in order to digest their meal at warmer temperatures. [34]
Heralded as the world's largest rodents, the South American rainforest natives can actually weigh as much as a full grown man.. But despite the fact that they apparently like to eat their own dung ...