Endangered crowned solitary eagle in the threatened Amazonian savannah

Taphonomic aspects of crowned hawk-eagle predation on monkeys.

This study provides a taphonomic analysis of prey accumulations of crowned hawk-eagles (Stephanoaetus coronatus) from Ngogo, Kibale National Park, Uganda, collected over 37 months from below nests of two eagle pairs. Crowned hawk-eagles are powerful predators capable of killing animals much larger than themselves, and are significant predators of cercopithecoid monkeys in forest habitats throug...

Facilitating Recovery of Threatened and Endangered Species

Is the endangered Grevy’s zebra threatened by hybridization?

Hybridization between an abundant species and an endangered species is cause for concern. When such hybridization is observed, it is both urgent and necessary to assess the level of threat posed to the endangered species. We report the first evidence of natural hybridization between two equids: the endangered Grevy’s zebra Equus grevyi and the abundant plains zebra Equus burchelli. Grevy’s zebr...

Lead concentrations in bones and feathers of the globally threatened Spanish imperial eagle

Raptors that consume game species may ingest lead fragments or shot embedded in their prey’s flesh. Threatened Spanish imperial eagles Aquila adalberti feed on greylag geese in southern Spain in winter, and often ingest lead shot. We analysed bone and feather samples from 65 Spanish imperial eagle museum specimens collected between 1980 and 1999, to investigate the prevalence of elevated lead c...

Endangered and Threatened Wildlife and Plants: Proposed Threatened Status for Southern Distinct Population Segment of Eulachon

We, the NMFS, have completed a review of the status of the Pacific eulachon (Thaleichthys pacificus; hereafter ‘‘eulachon’’) under the Endangered Species Act (ESA) in response to a petition submitted by the Cowlitz Indian Tribe to list eulachon as a threatened or endangered species. After reviewing the best scientific and commercial information available, we have determined that the species is ...