Migratory Bird Mass Die-off September 2020: Observations and Causes

Unfortunately, I experienced the shocking and incredibly sad mass die off of migratory birds in Colorado this September. Running the Colorado Trail from Waterton Canyon to South Platte, I saw bird bodies and struggling birds cluttering the trail.  Guests Dr. Jack Dumbacher (California Academy of Sciences) and Eric Hynes (Box Canyon Birding) will discuss the leading hypothesis behind the birds "falling from the sky" that occurred in the southwest this fall. 

Photo: Flycatchers and sparrows found by the author while running the Waterton Canyon to South Platte River section of the Colorado Trail. Sept. 2020. Photo credit: R. Gaylord