Bobolink Dolichonyx oryzivorus
Flight call description A ringing, slightly rising, "bink" or "wenk", often with a slightly husky quality.
Fig.1. Maryland September 29, 1994 (MO).
Bird in flight.
Similar species Western Meadowlark similar but averages higher-pitched and longer. House Finch can be similar but is shorter and higher-pitched. Swainson's Thrush is lower-pitched, longer, and more pure-toned. See thrush-like calls.
Behavior Primarily a nocturnal migrant but engages in resumed migration. Gives flight call regularly while perched and in flight during the day and during nocturnal migration.