Butterflies of the
Amazon and Andes
Family - HESPERIIDAE
tribe - PYRRHOPYGINI
Yanguna cosyra, Otun-Quimbaya,
subfamily Pyrrhopyginae comprises 163 known species, most of which
are found only in the tropical rainforests and cloudforests of South
America, although a few reach as far north as Mexico, and a single
species reaches Arizona. They are characterised by having bodies
which are very large in proportion to the wings. Other
characteristics include a massive muscular thorax, compressed
abdominal segments, prominent eyes, and antennae with recurved
genera, including Jemadia and
Yanguna have a pattern of hyaline
'windows' on the forewings, and are marked with stripes and bands of
red, blue or white. Other genera e.g. Mysarbia,
Pyrrhopyge lack the hyaline windows, and are characterised
instead by having bright pink or red markings on the head and / or
on the tip of the abdomen.
6 species in the genus Yanguna are all
similar, having a black ground colour with a blue sheen, and a
hyaline median band on the forewings. In
cosyra, thelersa and
cometes the basal area of the wings is
bright red, but this is vestigial in erebus,
and absent in tetricus.
Yanguna cosyra occurs from Guatemala to
Colombia and Ecuador.
This species occurs in cloudforest at elevations between about
incredibly fast on the wing, rocketing about in the vicinity of rivers
and waterfalls. When they settle it is invariably high up in a tree.