The team found bird feathers in a substantial number of their 14,000 samples, as much as 70 % during peak autumn migration. (sciencemag.org)
Back to Africa: autumn migration of the painted lady butterfly Vanessa cardui is timed to coincide with an increase in resource availability. (sciencenews.org)
Donna Hauser, Kristin Laidre, Harry Stern and colleagues examined changes in autumn migration timing of Beluga whale populations since the 1990s. (psc.apl.uw.edu)