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July1987] ShortCommunications 517 Interisland Variation in BloodDrinking by GalhpagosMockingbirds
 

Summary: July1987] ShortCommunications 517
Interisland Variation in BloodDrinking by GalhpagosMockingbirds
ROBERTL. CURRYAND DAVID J. ANDERSON·
DepartmentofBiology,TheUniversityofMichigan,AnnArbor,Michigan48109-1048USA
Few speciesof birds are known to feed on the blood
of living animals,and the occurrenceof thisbehavior
in populations of the Sharp-beaked Ground-Finch
(Geospizadifficilis)on Wolf and Darwin islands, Ga-
l·tpagos,hasbecomenotorious(Bowmanand Billeb
1965,KiSsterand KiSster1983,Schluter and Grant 1984).
It is lesswidely recognized,however,that Galhpagos
mockingbirds(Nesomimusspp.) on someislandsalso
drink blood from living hosts. Occasionalblood
drinking by mockingbirdson two islandswas men-
tioned previously, but without details on the fre-
quency or distribution of the trait (Bowman and Car-
ter 1971, Christian 1980).
We observed blood drinking during studies of
mockingbirdcooperativebreeding(Curry)andbooby
breedingbiology (Anderson)between 1981and 1985.

  

Source: Anderson, David J. - Department of Biology, Wake Forest University
Curry, Robert L. - Biology Department, Villanova University

 

Collections: Environmental Sciences and Ecology