Hi Martin: Thank you for your emial and by your generosity with Zenaida
macroura calls. I will try to answer some of your questions.
The only visual field mark I have for the Socorro Dove is more rusty
underparts as compared to Mourning Dove. Is this truly the only
difference in appearance?.
ACCORDING TO HOWELL AND WEBB, SOCORRO DOVE IS LARGER AND MORE HEAVILY THAN
MOURNIG DOVE. THE MOOING SONG IS QUITE DIFFERENTE FROM MODO.
Did Z. graysoni also occur on Roca Partida and San Benedicto? If so when
was it extirpated?
I DO NOT KNOW MARTY, BUT I COULD SENT A MESSAGE TO JUAN ESTEBAN MARTINEZ WH=
O
IS THE EXPERT OF THE ISLAS REVILLAGIGEDO BIRDS.
Does Z. macroura now occur on all three of the Islas Revillagigedos? If so,
I would worry about the classic case of superior competition by a
generally-adapted mainland species against any attempted re-introduction of
the island endemic. This could wind up like the Northwestern Crow, which
many of us believe has now been completely genetically swamped out of
existence by the more widespread American Crow.
MARTY, I THINK Z. MACROURA OCURR ON ALL THREE OF THE ISLAS REVILLAGIDEDO
(ISLA GUADALUPE, ISLA SOCORO AND CLARION).
my best regards,
Marty Michener
MIST Software Associates PO Box 269, Hollis, NH 03049
EnjoyBirds.com - Software that migrates with you.
http://www.EnjoyBirds.com
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