War zone bombing, barbed wire, hunters, utility electroshocks, etc.
are some of many hazards for migrating birds

1. war zone bombs  http://www.ppu.org.uk/learn/infodocs/st_environment.html
sucking jet engines  http://www.birdstrike.org/commlink/top_ten.htm
2. electroshocking utility lines
 http://www.fws.gov/birds/documents/powerlines.pdf
3. acid rain from coalfired utilities  http://news.nationalgeographic.com/news/2002/08/0813_020813_acidrain.html
4. sucking jet engines  http://www.birdstrike.org/commlink/top_ten.htm
5. shotguns (senators bought by the hunter lobby who introduce bills to remove protection..)
 http://www.ec.gc.ca/rcom-mbhr/default.asp?lang=en&n=13B4C8EE-1
 http://en.wikipedia.org/wiki/Migratory_Bird_Treaty_Act_of_1918
6. bulldozers removing their homes, drying up their marshes
 http://articles.latimes.com/1992-04-21/news/mn-585_1_gnatcatcher-habitat
7. oil spills weighting down birdfeathers before their deaths
 http://news.nationalgeographic.com/news/2010/08/100810-us-oil-spill-bird-migration-vin-video/
8. barbed wire
 http://www.wildlifefriendlyfencing.com/WFF/Home.html
9. traps from nonhunter birdeaters
10. USDA and EU avicidal sprays
 http://www.csmonitor.com/USA/Society/2011/0120/Bye-Bye-Blackbird-USDA-acknowledges-a-hand-in-one-mass-bird-death
11. water poisoned by insecticides, oil, arsenic, chromium, pcb's, pbb's ad infinitum
 http://www.ehow.com/about_5317418_pollution-effects-birds.html
12. choking on plastic
 http://articles.cnn.com/2009-11-03/tech/midway.atoll.albatross_1_midway-atoll-plastic-pacific-ocean?_s=PM:TECH

 http://www.raisethefist.com/news.cgi?artical=wire/13_Of_Many_Hazards_For_Migrating_Birds_:_Indybay-53.article&feature=1&np=1