September 29, 2016 – Field Sparrow (Spizella pusilla)
Requested by: @gepwin
These sparrows are abundant throughout the eastern half of the United States. Their diet is mostly made up of small seeds from various grasses, including crabgrass, foxtail, and horseweed. During the summer, about half of their diet becomes insects and other small invertebrates. Males return to the same breeding territory most years, while females and younger birds are less likely to return. When a female arrives in a male’s territory she may be attacked by a unmated male, struck out of the air, and sometimes driven to the ground. This appears to be a mating display, as often the pair will be observed searching for a nesting site the next day. Females choose nest locations, build the nests, and incubate the eggs alone. Males may help provide nest materials and both parents feed the chicks.