ÆÓÐÍÀËÛ
| Berkut,Ukraine http://www.geocities.com/berkut_ua/berkut.htm |  |
| Bird Behavior,USA http://www.ucc.uconn.edu/~millerd/bbframes.html | |
| Bird Conservation International,United Kingdom http://www.cup.cam.ac.uk/journals/bci/bcietoc.htm | |
| Birder’s World,USA http://www.birdersworld.com/ |  |
| Birding World,United Kingdom http://www.birdingworld.co.uk/ | |
| Birdwatch,United Kingdom http://www.birdwatch.co.uk/ |  |
| British Birds,United Kingdom http://www.britishbirds.co.uk/ |  |
| Buteo,Czech Republic http://chkot.envi.cz/en/an116.html |  |
| Butlleti del GRUP CATALA D`ANELLAMENT,Spain http://www.terra.es/personal/gca.gca/butgca15.htm |  |