![](/img/cover-not-exists.png)
Helpers and Egg Investment in the Cooperatively Breeding Acorn Woodpecker: Testing the Concealed Helper Effects Hypothesis
Walter D. Koenig, Eric L. Walters and Joseph HaydockVolume:
63
Language:
english
Journal:
Behavioral Ecology and Sociobiology
DOI:
10.2307/40295549
Date:
September, 2009
File:
PDF, 972 KB
english, 2009