Hamadryas februa

(Hübner, 1823)

Gray Cracker, Grey Cracker

Hamadryas februa is a cracker (Nymphalidae) ranging from Argentina through tropical America to Mexico, with rare strays reaching southern Texas. feed on sap and rotting fruit, while larvae specialize on Dalechampia and Tragia (Euphorbiaceae). The species exhibits pronounced in -related , with females being larger and more dispersive than males. Development from to adult takes approximately 33–34 days under laboratory conditions.

Hamadryas februa by (c) Douglas, some rights reserved (CC BY), uploaded by Douglas. Used under a CC-BY license.

Hamadryas februa 15zz by Photo by David J. Stang. Used under a CC BY-SA 4.0 license.

Hamadryas februa 11zz by Photo by David J. Stang. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Hamadryas februa: /ˌhæm.əˈdraɪ.əs ˈfɛb.ruː.ə/

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Identification

are distinguished by wingspan of 70–86 mm and gray coloration typical of 'cracker' butterflies in Hamadryas. Males and females differ in size: females possess larger , greater total wing area, and higher wing loading. The produces characteristic cracking sounds during —a trait shared with but not unique to this species. Separation from other Hamadryas species requires examination of wing pattern details and genitalia.

Images

Habitat

Subtropical forests, forest edges, and cultivated areas with trees. In Rica, occurs in semi-deciduous lowland forests where larval plant Dalechampia heteromorpha grows in shady places along forest edges. Host plant patches are small and widely separated, creating a fragmented resource distribution.

Distribution

Argentina north through tropical America to Mexico. Rare strays documented in lower Rio Grande Valley, southern Texas. H. f. februa occurs in Brazil, Paraguay, and Peru; H. f. ferentina ranges from southern Texas and Mexico through Honduras to Trinidad.

Seasonality

are on wing year-round in tropical portions of range. In southern Texas, active from August to October.

Diet

feed on sap and rotting fruit. Larvae feed on Dalechampia (including D. heteromorpha) and Tragia species (Euphorbiaceae).

Host Associations

Dalechampia heteromorpha - larval plantSmall herbaceous vine used for oviposition and larval development
Dalechampia species - larval plantGeneral
Tragia species - larval plantAdditional

Life Cycle

Complete with , larva, pupa, and stages. Development time 33–34 days when reared on Dalechampia heteromorpha in laboratory conditions. Multiple per year maintained in Guanacaste, Rica due to year-round availability of lush plant vegetation even during dry season.

Behavior

rest on tree trunks; specific trees used for resting have been documented relative to plant locations. Larvae feed on host plant vegetative structures. Females are more dispersive than males based on . amount affects body mass allocation: both sexes increase mass with decreasing habitat amount, with females showing more pronounced response including increased total mass and wing loading while decreasing thorax allocation.

Ecological Role

Herbivore in larval stage; serves as frugivore and sap-feeder. Part of complex in neotropical forest . plant Dalechampia heteromorpha supports multiple herbivorous insect , indicating shared resource use in forest edge .

Similar Taxa

Hamadryas feroniaCongeneric cracker with overlapping range; requires wing pattern and genital examination for separation
Hamadryas glauconomeSimilar gray coloration and cracking sound production; distinguished by specific wing markings