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The birds' phylogenetic relationships to major living reptile groups. (The turtles ' position is uncertain: Some authorities embed them inside the Archosaurs , with birds and crocodiles .) Aves can mean all archosaurs closer to birds than to crocodiles (alternately Avemetatarsalia )
Reptiles tend to avoid confrontation through camouflage. Two major groups of reptile predators are birds and other reptiles, both of which have well-developed color vision. Thus the skins of many reptiles have cryptic coloration of plain or mottled gray, green, and brown to allow them to blend into the background of their natural environment. [135]
A grey heron in delta-wing posture, facing the Sun. Sunning or basking, sometimes also known as sunbathing, is a thermoregulatory or comfort behaviour used by humans, animals, especially birds, reptiles, and insects, to help raise their body temperature, reduce the energy needed for temperature maintenance or to provide comfort.
The low relative mass of the flocculi in birds is also a result of birds having a much larger brain overall; though this has been considered an indication that pterosaurs lived in a structurally simpler environment or had less complex behaviour compared to birds, [165] recent studies of crocodilians and other reptiles show that it is common for ...
Birds that show food hoarding behavior have also shown the ability to recollect the locations of food caches. [23] [24] Nectarivorous birds such as hummingbirds also optimize their foraging by keeping track of the locations of good and bad flowers. [25] Studies of western scrub jays also suggest that birds may be able to plan ahead. They cache ...
In addition to admitting species that in our 38 years of records were typically these species that should be hibernating or brumating (brumation is like hibernation but specific to reptiles) in ...
Birds are one of only four taxonomic groups to have evolved powered flight. A number of animals are capable of aerial locomotion, either by powered flight or by gliding. This trait has appeared by evolution many times, without any single common ancestor. Flight has evolved at least four times in separate animals: insects, pterosaurs, birds, and ...
Birds are distinctive in the way they care for their young. 90% of bird species display biparental care, including 9% of species with alloparental care, or helpers at the nest. [9] Biparental care may have originated in the stem reptiles that gave rise to the birds, before they developed flight. [54]