Topic: collision

Pigeon keeper Chris Szwaba, left, releases birds from a loft atop the roof of the Sunset Park building where he keeps 400 pigeons, Monday, April 4, 2016, in the Brooklyn borough of New York. Rising rents and gentrification have left only about 100 pigeon keepers in a New York City area that was once one of the hubs of a sport in which keepers try to lure birds away from rivals. Szwaba said he learned the hobby from his father. After the birds breed, Szwaba expects to have as many as about 700 birds, which he refers to as his "babies." (AP Photo/Kathy Willens) (AP)

Bird's worst nightmare: glassy buildings

Farah Qaiser - Massive Science
(Greg Allen/invision/ap)

Prachi Gupta