Birds 'falling out of the sky' in mass die-off in south-western US

Wildfires and climate crisis cited as possible causes for the deaths of thousands of migrating species heading south for the winter

Thousands of migrating birds have inexplicably died in south-western US in what ornithologists have described as a national tragedy that is likely to be related to the climate crisis.

Flycatchers, swallows and warblers are among the species falling out of the sky" as part of a mass die-off across New Mexico, Colorado, Texas, Arizona and farther north into Nebraska, with growing concerns there could be hundreds of thousands dead already, said Martha Desmond, a professor in the biology department at New Mexico State University (NMSU). Many carcasses have little remaining fat reserves or muscle mass, with some appearing to have nose-dived into the ground mid-flight.