RANGE: The passenger pigeon was found across most of North America east of the Rocky Mountains ... this bird's display took place on a branch or other perch; the male made a "keck" call while near a ...

The bird, a symbol of the power and strength of the United States for more than 240 years, earned an overdue honor this week.

A perch costs little but provides an optimal cage enrichment for several reasons: 1. A perch provides the opportunity for species-typical behavior, i.e. sitting in an elevated position. 2. Sitting in ...