Asylum Birds are found in the courtyard of the Asylum of Chaos. They do not attack, nor can they be killed. They do not move unless approached. They do not have HP or Defense. They are immune to pretty much everything. They are there for environmental ambiance, much like the animals that hang out in the Nexus.
Immunities: Everything except Stasis (and that only because of a typo in the XMLs).
Asylum Birds cannot be hit, killed, or otherwise affected. They do not attack players. When a player approaches one, it will fly to a nearby tile and stay still until approached again.
Does not drop loot.