Marbled Godwit vs Long-billed Dowitcher

The Marbled Godwit and the Long-billed Dowitcher can be distinguished by their feeding behavior and bill structure. The Long-billed Dowitcher has a notably long bill, about twice the length of its head, and exhibits a distinctive 'sewing machine' feeding motion. In contrast, the Marbled Godwit has a slightly upturned bill and lacks this specific feeding behavior.

1. Bill Structure: The Long-billed Dowitcher has a long, straight bill that is about twice the length of its head, whereas the Marbled Godwit has a slightly upturned bill. 2. Feeding Behavior: Look for the 'sewing machine' motion in the Long-billed Dowitcher when feeding. 3. In Flight: The Long-billed Dowitcher shows a white triangular patch above its tail, which can be a useful mark in flight.

The Long-billed Dowitcher is known for its 'sewing machine' motion while feeding, a behavior not observed in the Marbled Godwit.