Cory's
Rob,
Sounds like an interesting trip.
There are immense numbers of borealis Cory's breeding on the Azores, Madeira and Canaries and are believed to fan out across the Atlantic, most moving down into the waters off northern Brazil but a significant fraction of the populations crosses and then moves up the eastern seaboard of the US to summer off the mid-Atlantic States and New England (most of the birds seen from FL to MA). Exact numbers and locations depend on water temperatures, Gulf Stream eddies etc. The Mediterranean birds (diomedea) either stay year round in the Med or move down the west coast of Africa and even round the Cape of Good Hope into the Indian Ocean. Close scrutiny suggests that a few come across and up to our area.
Cory's attend the Azorian colonies for 9 mo of the yr (Feb-Sep) but presumably travel considerable distances to feed. Non-breeders will wander further and may account for most of the birds seen off the eastern US in summer.
Angus
Sounds like an interesting trip.
There are immense numbers of borealis Cory's breeding on the Azores, Madeira and Canaries and are believed to fan out across the Atlantic, most moving down into the waters off northern Brazil but a significant fraction of the populations crosses and then moves up the eastern seaboard of the US to summer off the mid-Atlantic States and New England (most of the birds seen from FL to MA). Exact numbers and locations depend on water temperatures, Gulf Stream eddies etc. The Mediterranean birds (diomedea) either stay year round in the Med or move down the west coast of Africa and even round the Cape of Good Hope into the Indian Ocean. Close scrutiny suggests that a few come across and up to our area.
Cory's attend the Azorian colonies for 9 mo of the yr (Feb-Sep) but presumably travel considerable distances to feed. Non-breeders will wander further and may account for most of the birds seen off the eastern US in summer.
Angus
No comments:
Post a Comment