This is a guide to altricial passerines. It has an explanation of variables used for aging birds and an explanation of methodology employed, and provides information obtained while recording the early aging of the Dusky Flycatcher, the Carolina...
For the past 18 months, the National Wildlife Refuge System has worked to create a vision that will guide the management of the Refuge System during the next decade and beyond. Conserving the Future is built on the foundation and inspiration of...
