Effects of straw bedding on non-social and abnormal behavior of captive lowland gorillas (Gorilla gorilla gorilla) (1997)

Brown, D. L. , Gold, K. C.

Abstract

Two individuals were frequently observed to hold their ears or head while the exhibit was in an unbedded condition. This behavior virtually disappeared in the enriched condition. ... Of the eight individuals found to engage in coprophagy, five individuals were observed to exhibit this behavior in solely the unbedded condition. Individuals who engaged in regurgitation-reingestion demonstrated lower levels of this behavior in the bedded condition.