Analysis of information sources in references of the Wikipedia article "Bird strike" in English language version.
Waterfowl (30%), gulls (22%), raptors (20%), and pigeons/doves (7%) represented 79% of the reported bird strikes causing damage to USA civil aircraft, 1990–2012.... Over 1,070 civil aircraft collisions with deer and 440 collisions with coyotes were reported in the USA, 1990–2013.... The North American non-migratory Canada goose population increased about 4-fold from 1 million birds in 1990 to over 3.5 million in 2013.... The North American population of greater snow geese increased from about 90,000 birds in 1970 to over 1,000,000 birds in 2012.