Branches bend under the weight of mixed flocks of blackbirds, cowbirds and starlings, a hundred thousand strong, gathering for mass migrations.

• 一群群的各种黑鸟、燕八哥和椋鸟聚集在一起，有十万之众，把许多树枝都压弯了。它们聚在一起要进行大规模的迁徙。