The eastern meadowlark is a ground forager, searching for its invertebrate prey while walking or running along the ground, as well as probing beneath the soil with its beak (3). Its diet consists mainly of grasshoppers and crickets, with caterpillars, grubs and seeds also being taken (3).
The breeding season for the eastern meadowlark occurs between late March and August, and begins with the male establishing and defending a territory. During territorial disputes, the male will use singing, posturing and jump-flights, where they spring upwards and fly to a point several metres away with fluttering wing gestures (3). Each male usually pairs with two females, with courtship displays between the pairs including aerial chases and jump-flights (2) (3).
The female eastern meadowlark is solely responsible for the construction of the nest, which is built on the ground out of grasses woven into surrounding vegetation (2). The structure of the nest can vary, with some having a roof and even a runway leading to the entrance (2) (3). The clutch size is between 2 and 6 eggs and these are incubated by the female for 13 to 14 days (3). The naked hatchlings are fed mainly by the female, though the male will assist occasionally (3). The young fledge at around 10 to 12 days old and rely on the adult birds for food for a further 2 weeks (3).