Kosta Rika Sarı Paçalı Serçesi Atlapetes tibialis

Unique sooty-gray bird with odd yellow tufts of feathers at the base of each leg. Darker black on head and wings. Rather hefty and long-tailed with sizable conical bill. Typically found close to the ground, working through low tangles and bushes in pairs or small groups. Prefers forest and edges. Sexes alike; juveniles lack yellow but overall color diagnostic (and usually in group with adults).