"The State of the Birds" 2014 report found that red knots (above) and other shorebirds are among the most threatened groups in the U.S. More than half of U.S. shorebird species are on the report's Watch List — species that are currently endangered or at risk.
Gerrit Vyn/The Smithsonian Institution
Off the coast of Southern California, a crowd watches a blue whale rise to the surface earlier this summer. A new study says the population of blue whales off the West Coast is close to historic levels.
A box of chicken eggs painted to look like marbled murrelet eggs. The eggs contain a chemical that induces vomiting. Scientists are trying to teach the endangered bird's predator, a type of jay, to avoid murrelet eggs.