Field marks: larger than other warblers, long yellow stripe over eye, bill slightly upturned, single wing bar (12 cm.)
极北柳莺 – jí běi liǔ-yīng – ‘extreme north willow warbler’
Most of the birds described here are found in
The Arctic warbler undertakes one of the longest migrations of any Asian or European songbird. During the summertime breeding season, this species can only be found in the extreme north of
The Arctic Warbler is one member of a large family of warblers, “Acrocephalinae”.
The Arctic Warbler is part of a sub group of warblers known as “leaf warblers” This group includes all the Asian warblers that are usually seen foraging high in trees for insects. Other species of warblers may choose to hunt on the ground for food or perch along rivers or ponds. All leaf warblers have greenish backs and white under parts with similar markings making identification very difficult. This species can usually be distinguished by its single wing bar, larger size and slightly upturned bill.
During spring and fall migrations, several species of leaf warblers can often been seen together foraging for food among the treetops. All of these species move very quickly while feeding leaping from branch to branch in a state of perpetual motion. Under these conditions it is often impossible to identify which species one is observing. Even seasoned birdwatchers will be unable to make exact warbler identifications on most days.
|Photo by Lip Kee|