Well, everything, actually!
In an article for the first edition of Cryptozoology Bernard Heuvelmans wrote that cryptozoology is the study of 'unexpected animals' and following on from that perfectly reasonable assertion, it seems to us that whereas the study of out-of-place birds may not have the glamour of the hunt for bigfoot or lake monsters, it is still a perfectly valid area for the Fortean zoologist to be interested in.
- Stolen African penguin's chicks die at South Afric...
- UK police tackle Cyprus bird poachers
- Feral chickens spread light on evolution