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The testing of intelligence in birds is therefore usually based on studying responses to sensory stimuli. The corvids ( ravens , crows , jays , magpies , etc.) and psittacines ( parrots , macaws , and cockatoos ) are often considered the most intelligent birds, and are among the most intelligent animals in general.
The following table gives information on the number of neurons estimated to be in the sensory-associative structure: the cerebral cortex (aka pallium) for mammals, the dorsal ventricular ridge ("DVR" or "hypopallium") of the pallium for birds, and the corpora pedunculata ("mushroom bodies") for insects.
Brains of an emu, a kiwi, a barn owl, and a pigeon, with visual processing areas labelled. The avian brain is the central organ of the nervous system in birds. Birds possess large, complex brains, which process, integrate, and coordinate information received from the environment and make decisions on how to respond with the rest of the body.
Brain–body mass relationship for mammals [dubious – discuss]. Brain–body mass ratio, also known as the brain–body weight ratio, is the ratio of brain mass to body mass, which is hypothesized to be a rough estimate of the intelligence of an animal, although fairly inaccurate in many cases.
It has been suggested that g is related to evolutionary life histories and the evolution of intelligence [130] as well as to social learning and cultural intelligence. [ 131 ] [ 132 ] Non-human models of g have been used in genetic [ 133 ] and neurological [ 134 ] research on intelligence to help understand the mechanisms behind variation in g .
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Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. [1] [2] [3] In colloquial English, they are known as the crow family or corvids.