Most studies of the family life of young birds after they leave the nest have been descriptive and anecdotal with little quantitative behavioral data, despite the many interesting problems involved in interactions of the ...

This report summarizes studies of the behavior of Black-capped Chickadees (Parus atricapillus) conducted at the UWM Field Station since 1970. Vocalizations and responses to predators are emphasized. Chickadees are very ...

A peck-dominant type of dominance hierarchy was demonstrated in a group of twenty-one Black-capped Chickadees and was consistent with what is expected of this species of Paridae at the interflock level. No significant ...

Six cygnet calls, eight adult calls, and one nonvocal sound of Trumpeter Swans are categorized and described. Calls vary greatly in complexity. Many form graded series, while others are discrete. Most of the cygnet calls ...

Thirteen-lined ground squirrels (Citellus tridecemlineatus) are among the more abundant and conspicuous Midwestern mammals, yet surprisingly little is known of their behavior under natural conditions, except for the study ...

The dominance of females over males in winter flocks is rare. In this paper, I report on female dominance over males in winter flocks of Purple Finches (Carpodacus purpureus). Females won nearly all observed intersexual ...

Unrelated bobwhite quail (Colinus virginianus) chicks were hatched together and raised together. Each chick was tested in an arena with tape recorded separation, contentment and distress calls from a brood-mate and an ...