female; uniform brown plumage; rounded conical bill (Mexico; 2011-03-16)

White-collared Seedeater
Sporophila morelleti

Native Range: North America and Middle America

Notes: the range of this Central American species barely extends into the United tates (in southern Texas); strong sexual dimorphism with the female being plain brown all over and the male (not pictured here) showing a black-and-white-patterned plumage with a broad white collar.