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Juvenile birds are paler than the adults and are mottled white below rather than barred. The spot in front of the eye is tinged with brown while the stripe behind is shorter than in the adult. The bill and iris are brownish and the legs and feet are yellow-ochre. [4] It is a noisy bird with a variety of loud calls.
This effect is predominantly seen in shallow diving birds as buoyancy effects are strongest. [clarification needed] [11] Higher masses in diving birds appear to be correlated with higher wing loading and consequently larger wings. Faster flying speeds also result from higher wing loading which would be potentially detrimental for small flying ...
Peto's paradox is the observation that, at the species level, the incidence of cancer does not appear to correlate with the number of cells in an organism. [1] For example, the incidence of cancer in humans is much higher than the incidence of cancer in whales, [2] despite whales having more cells than humans.
Spirama helicina resembling the face of a snake in a deimatic or bluffing display. Deimatic behaviour or startle display [1] means any pattern of bluffing behaviour in an animal that lacks strong defences, such as suddenly displaying conspicuous eyespots, to scare off or momentarily distract a predator, thus giving the prey animal an opportunity to escape.
It is an immobile state most often triggered by a predatory attack and can be found in a wide range of animals from insects and crustaceans to mammals, birds, reptiles, amphibians, and fish. [ 1 ] [ 5 ] [ 2 ] Apparent death is separate from the freezing behavior seen in some animals.
Virtually all the raptorial birds sympatric in distribution with the blue jay may prey upon it, especially swift bird-hunting specialists such as the Accipiter hawks. Diverse predators may prey on jay eggs and young up to their fledgling stage, including tree squirrels , snakes , cats , crows , raccoons , opossums , other jays and possibly many ...
How common is it for birds to collide with aircraft? "The rate of bird strikes in the U.S. was 2.83 per 10,000 departures for the period from 2009 to 2018," Kiernan said. "Of these, only 2 to 8% ...
The African paradise flycatcher is a noisy bird with a harsh scolding call. It has short legs and sits very upright whilst perched prominently, like a shrike. It is insectivorous, often hunting by catching flies on the wing, and eating eggs, larvae and adults. It also feeds on spiders and sometimes consumes berries.