This recent publication has been featured in the Latest news section in the Science Magazine's website: http://www.sciencemag.org/news/2016/12/radar-spots-trillions-unseen-insects-migrating-above-us You can also read a summary of the paper here and access…
Bird migration detected by Israeli Airforce weather radars, providing altitudinal profile, average direction and density during early November 2014 (image courtesy of Adriaan Dokter, NIOO-KNAW / University of Amsterdam).
Hummingbirds are a highly agile group of flyers capable of moving in all directions. In this work we measured Anna’s hummingbirds (Calypte anna) within a wind-tunnel in order to compare forward, still-air hovering and backward flight.