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Altricial birds are less able to contribute nutrients in the pre-natal stage; their eggs are smaller and their young are still in need of much attention and protection from predators. This may be related to r/K selection; however, this association fails in some cases. [18] In birds, altricial young usually grow faster than precocial young.
folivores: birds that forage for and eat leaves, such as hoatzin and mousebirds. [141] [146] frugivores: birds that forage for and eat fruit, such as turacos, tanagers and birds-of-paradise. [146] granivores: (sometimes called seed-eating): birds that forage for seeds and grains, [149] such as geese, grouse and estrildid finches. [141] [146]
Courtship allofeeding occurs in half of bird subfamilies and mainly appears in monogamous bird species. [6] Courtship allofeeding is hypothesized to strengthen the bond between pairs or increase a female's nutritional level before laying eggs. [6] For example, in the Sichuan jay (P. internigrans), females are fed by only one male during ...
People are often confused about the life cycle of birds and what one is supposed to do with a baby bird found outside of a nest—but not this Bernese Mountain Dog.
Female birds are able to produce more of a certain gender of birds that are more likely to survive under extreme conditions. In birds, the females' egg determines the gender of the offspring, not the male's sperm. In zebra finches, a study showed the effect of food on gender ratio production. For females, egg production is a metabolically ...
A leading hypothesis for why female caribou evolved to grow antlers suggests their antlers are the result of evolutionary changes due to their habitat. Cold tundra with a notable lack of resources ...
A family in the Texas Panhandle saved a baby bird by wrapping it in a warm tortilla during a backyard barbecue, Texas Monthly reported.The adorable rescue unfolded last Saturday, when the family ...
The blue-footed booby is one of only two species of booby that raises more than one chick in a breeding cycle. The female blue-footed booby lays two or three eggs, about four to five days apart. Both male and female take turns incubating the eggs, while the nonsitting bird keeps watch.