There appear to be 2 different kinds in the pictures-

the ones with black wings (4 from bottom) are snow geese. The ones with black heads are trumpeter swans. Believe trumpeter swans have the largest wing span of all swans. Both fly over 3000 miles from Alaska to winter here.

所有跟帖： 

• 也有可能是Tundra Swan：） -冬梦- ♀ (0 bytes) () 03/26/2007 postreply 12:59:14

• 确实是Tundra Swan和雪雁. -independent- ♂ (0 bytes) () 03/26/2007 postreply 13:02:51

• 好象trumpeter swans多在WEST COAST -冬梦- ♀ (77 bytes) () 03/26/2007 postreply 13:07:50