Red Cracker

Hamadryas amphinome belongs to Nymphalidae. Red cracker refers to its reddish underside, while cracker describes the sound-producing butterfly group. [2][3]

The upper wings are blue-black with a contrasting pale diagonal forewing band. The underside is reddish, producing a marked contrast between an open-wing view and the reverse. [2]

The North American account gives a tropical range from Mexico to Argentina, including Cuba. Northern observations include occasional strays beyond the main tropical distribution. [2]

Larvae occur in groups on their food plant, with Dalechampia recorded as a host. [2]

The larvae feed on Dalechampia leaves. Adults take juices from overripe and rotting fruit. [2]

Adults rest on tree trunks with the head directed downward and the wings spread. In a Costa Rican field study, Hamadryas amphinome perched at a mean estimated height of 5.4 m, higher than the other Hamadryas species compared. [2][3]

A 1998 investigation of five Hamadryas species, including H. amphinome, proposed a percussive sound mechanism involving modified forewing veins. The authors attributed the clicks to rapid wing closure bringing these structures into contact. [3]

Across the five Hamadryas species observed in the Costa Rican and Panamanian study, resting butterflies tended to select bark backgrounds whose colour resembled their wings. [3]

Papilio amphinome is the historical combination retained in taxonomic resources. Hamadryas places the same species in its current generic context; cracker refers to the group’s audible clicks. [4][3]

The pale diagonal band stands out on the blue-black upper forewing. The reddish underside supplies a separate set of colours and markings. [2]

The illustration retains the pale forewing band, blue-black upper pattern and reddish reverse as distinct flat colour regions within bold outlines. [2]

Protect a physical specimen from direct light, damp conditions and handling. A closed enclosure also reduces exposure to dust and insect pests. [1]

How do the wing surfaces differ? The upper surface is blue-black with a pale diagonal forewing band; the reverse is reddish. [2]

How high does the red cracker perch? The Costa Rican field study recorded a mean estimated perch height of 5.4 m for this species. [3]

The species account documents feeding, wing surfaces and communal larvae. Monge-Nájera and colleagues’ 1998 study reports field observations of five Hamadryas species and their proposed sound mechanism. [2][3]