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...
Birds; Monitoring; Predators; Predator control; Species of concern; Statistics;
These are the results of the 2003 peregrine falcon monitoring plan. The plan was established after the species' de-listing from the endangered species list, and takes place every three years. The report includes a description of methodology as...
This is a status assessment of the double-crested cormorant in North America as of 2001. It includes general information on the bird, biological information and area-specific population information for throughout North America.