title: The effects of testosterone and estrogen on the rate of long-calling vocalization in juvenile laughing gulls, Larus atricilla.
mesh_terms: D000818:Animals; D001717:Birds; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D008297:Male; D012737:Sex Factors; D013268:Stimulation, Chemical; D013739:Testosterone / Q000494:pharmacology*; D014828:Vocalization, Animal / Q000187:drug effects*
chemical_list: D013739:Testosterone; D004958:Estradiol