Wagtails and Pipits
The family Motacillidae includes 10 species found in North America.
Wagtails are found in Europe, Asia and Africa, usually near water. Wagtails are slender birds with long bills. They bob their head when they walk. Insects and seeds make up most of their diet. They nest on the ground in a cup-like nest. Wagtails usually are solitary.
Pipits are found on the ground in areas with short grass, often in flocks. Pipits have long legs and often bob their tail.
Wagtails - Patuxent Bird ID Center