Hybridization and the nature of the isolating mechanism in sympatric populations of meadowlarks (Sturnella) in Ontario.
D000818:Animals; D001717:Birds / Q000145:classification; D001947:Breeding; D005260:Female; D006824:Hybridization, Genetic; D008297:Male; D009864:Ontario; D012726:Sexual Behavior, Animal; D013016:Sound; D013045:Species Specificity