Orochelidon murina (Brown-bellied Swallow)
13-14 cm. Dark metallic blue above, grayish brown below, black crissum. It somewhat resembles the Golondrina Musliblanca (Atticora tibialis), which is smaller, darker and has whitish thighs (although they cannot always be seen). The latter species lives lower in the Andes, so it is unlikely to…
