In the neuroanatomy of animals, an avian pallium is the dorsal telencephalon of a bird's brain. The subpallium is the ventral telencephalon.
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.
A 2002 conference at Duke University (Avian Brain Nomenclature Consortium) established a standard nomenclature for describing the avian pallium as follows:[1][2][3][4]