Two species of cormorants are found in Arizona: the Neotropic Cormorant (Nannopterum brasilianum) and the Double-crested Cormorant (Nannopterum auritum).
The Neotropic Cormorant is the most widespread and regularly seen species in Arizona. It thrives in warm, freshwater habitats such as ponds, reservoirs, rivers, and wetlands, especially in the southern and central parts of the state. This slender, long-tailed cormorant often perches with its wings outstretched and is known to nest colonially on platforms over water.
The Double-crested Cormorant is more commonly found in northern Arizona and along larger water bodies such as Lake Havasu and Lake Mead. It is bulkier than the Neotropic and has a shorter tail and more prominent orange-yellow throat pouch. Both species are often seen diving for fish and roosting communally.