In the neuroanatomy of animals, an avian pallium is the dorsal telencephalon of a bird's brain.
The pallium of avian species tends to be relatively large, comprising ~75% of the telencephalic volume.
Birds have a unique pallial structure known as the hyperpallium, once called the hyperstriatum.
Evidence suggests the avian pallium's neuroarchitecture to be reminiscent of the mammalian cerebral cortex.
[1] The avian pallium has also been suggested to be an equivalent neural basis for consciousness.