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Copulation by California condors

The Auk

By:
and
https://doi.org/10.2307/4084220

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Abstract

Koford (Res. Rept. No. 3, Natl. Audubon Soc., 1953) observed sexual display among California Condors (Gymnogyps californianus) on more than 30 occasions, yet only once did he see what he thought was copulation. Some of the displays he watched were quite intricate, with considerable posturing and "male" aggression, but no such activity preceded this copulation. The birds sat several feet apart for over 1 hour, then one climbed onto the other's back, staying there 1/2 minute and flapping gently at the apparent moment of coition. Afterward they sat quietly 1/2 hour before flying away. This led Koford to state (p. 79) that "possibly in Gymnogyps copulation is not immediately preceded by display."

We have records of 8 California Condor copulations, 5 of which are similar to that described above. The three other occasions began similarly, with the birds sitting quietly, but then the "male" displayed briefly before the "female" with wings half spread and head drooping forward. This elicited no apparent response, but the male immediately walked behind and mounted the female. The apparent moment of coition was accompanied by gentle wing flapping in all instances.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Copulation by California condors
Series title:
The Auk
DOI:
10.2307/4084220
Volume:
89
Issue:
2
Year Published:
1972
Language:
English
Publisher:
American Ornithological Society
Contributing office(s):
Patuxent Wildlife Research Center
Description:
2 p.
First page:
444
Last page:
445