Please use links for idetails on endangered species in Great Britain and the USA.
- – US Environmental Protection Agency = www.epa.gov/endangered-species
- – National Audubon Society = https://www.audubon.org
- – Royal Society for the Protection of Birds = www.rspb.org/uk
- – British Trust for Ornithology
- – International Union for the Conservation of Nature = www.iucn.org/redlist