Twenty-eight × Port Lincoln Parrot

“The south-western forest form, semitorquatus, with its all-green
belly and prominent red frons, intergrades sharply with the smaller,
inland and arid-country form zonarius, with its broad yellow-
breast-band and vestigial red frons, on the eastern margins of the
sclerophyll forest of jarrah-marr-kam (Fisher 1970; Serverty &
Whittell 1976; Forshaw 1981). Following widespread land clear-
ing, zonarius genes have now introgressed semitorquatus on the
Swan coastal plain (Fisher 1970).”

“Hybrid Zones in Australian Birds
Julian Ford
Julian Ford (1987) Hybrid Zones in Australian Birds, Emu - Austral Ornithology,
87:3, 158-178, DOI: 10.1071/MU9870158”

Range of Australian Ringneck Subspecies:

Example in intergrade zone (Bibra Lake, Perth):

eBird taxonomy update 2022- intergrades

Posted on March 30, 2023 06:06 AM by andocommando