The clade, Archosauria, encompasses crocodilians and birds. Both crocodilians and birds exhibit vocalizations to communicate a variety of behaviours including courtship, distress, and aggression. The similarity in vocalization behaviours of modern day Archosauria suggests that vocal communication may be a conserved behavioural trait also exhibited by ancient Archosauria.
Digital Object Identifier
Goldstein, Rachel A. and Gray, Patricia M.
"Evolutionary GEM: Crocodilian Vocalizations,"
WURJ: Health and Natural Sciences: Vol. 9
, Article 4.
Available at: https://ir.lib.uwo.ca/wurjhns/vol9/iss1/4