Butterflies of the
Amazon and Andes
Family - NYMPHALIDAE
Tribe - COEINI
aeilus, male, Rio
Alto Madre de Dios, Peru
© Adrian Hoskins
species was formerly known as
It is one of 4 members of the genus Baeotus,
all of which are confined to the neotropics.
butterfly is sexually dimorphic - the male upperside being dark
brown with a broad median band of reflective pale blue scales, while
the female is banded with pale orange.
breeds in lowland wet tropical forests at altitudes below about
500m, and appears to be largely confined to the upper Amazon areas
of Brazil, Ecuador and Peru.
Unknown. The genus appears to be very closely related to
Historis, which suggests that
Moraceae and Urticaceae are probable foodplants.
are typically seen in one's or two's, often in the company of
Baeotus deucalion or
B. japetus, as regular visitors to
patches of mineral-rich damp sand along the shores of rivers in
September 2008 at Boca Manu, Peru, I observed groups of up to 20
aggregating in company with swarms of other species on the muddy shore
of the Rio Madre de Dios. It was a very hot sunny day, and the flooded
river had just subsided following 2 days of heavy rain. This appears
to indicate that the species emerges en masse after heavy rainfall,
and the occurrence of large aggregations of males at such times is
probably a regular event.
have a rapid and powerful flight, and if disturbed, fly up and settle
on nearby tree trunks or vegetation, but quickly return to their
original feeding spot.