Estimating the diet of urban birds: The problems of anthropogenic food and food digestibility
A variety of methods exist for assessing the diets of wild birds, each of which has its strengths and weaknesses. The objective of this study was to compare diet data collected in parallel by behavioural observations and faecal analysis from an urban population of Penelope superciliaris (rusty-margined guan) over a 12-month continuous period (April 2006 […]
Teaching behavioral observation in the 21st century
Aggression with mixed age-sex groups of bolivian squirrel monkeys following single animal introductions and new group formations
The social organization of the Bolivian squirrel monkey (Saimiri boliviensis boliviensis) is thought to be sexually segregated, with males and females forming separate social groups during the nonbreeding season. To investigate the influence of this social order on patterns of aggression, controlled single animal introductions within established groups and establishment of new groups were studied […]