AnimaliaHighest rank in taxonomy. Groups all life into domains: Animalia, Plantae, Fungi, etc.IUCN LCInternational Union for Conservation of Nature — the world authority on species extinction risk, using standardized criteria. — Least Concern — widespread and abundant; not at immediate risk of extinction.In ProgressCurrent stage of this record in the editorial review workflow. Recent Sighting
Hamadryas feronia
Blue Cracker
Linnaeus, 1758
Detailed Texts Multi-lang
The Hamadryas feronia exhibits extraordinary disruptive camouflage. Its dorsal wings show complex patterns of black, white, and bluish tones on a grayish background, perfectly mimicking the bark of trees where it rests. When perched with wings spread, it becomes virtually invisible against the trunk.
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Anonymous Curator
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Under Review
Last modified by
Julia Trouin
TaxonomyBiological classification ranks placing this species within the tree of life, from Kingdom down to Genus.
PhylumRank below Kingdom. Groups organisms sharing a fundamental body plan (e.g., Chordata = vertebrates and some invertebrates).Arthropoda
ClassRank below Phylum. Subdivides by structural traits (e.g., Mammalia, Aves, Reptilia, Insecta).Insecta
OrderRank below Class. Groups related families sharing common ancestry (e.g., Carnivora, Primates).Lepidoptera
FamilyRank below Order. Groups closely related genera (e.g., Felidae = cats, Canidae = dogs).Nymphalidae
GenusRank just above Species. The first word in the two-part binomial scientific name.Hamadryas
Taxonomic AuthorityThe scientist who first formally described and published this species, followed by the year of publication.Linnaeus, 1758
Record Completeness
96%Coming soon
Ecology & StatusHow this species lives: habitat preferences, diet, behavior, population status, and role in its ecosystem.
OriginWhether the species is native (evolved here), endemic (found only here), or introduced by human activity.
Native
Population TrendDirection of change in population size over time: increasing, stable, decreasing, or unknown.
Stable
Breeding SeasonTime of year when this species typically reproduces or flowers.
Year Round
Trophic RolePosition in the food chain: producer, herbivore, carnivore, omnivore, decomposer, or parasite.
Frugivore
Recent SightingsWhether this species has been observed in the wild in Costa Rica within recent years.
Yes
Habitat SummaryOverview of the specific ecosystems and environments where this species is found in Costa Rica. Multi-lang
It inhabits mainly humid tropical and deciduous forests, preferring forest edges and dense wooded areas from the southern United States to Brazil.BehaviourDaily activity patterns, movement, territory use, foraging style, and seasonal behavioral changes. Multi-lang
Unlike most butterflies, they prefer to perch head down on trunks, which allows them to take off quickly upwards in the face of any detected threat. Their territorial behavior is intense and extremely persistent.Social ActivitySocial structure: whether the species is solitary, paired, or colonial; hierarchy and communication. Multi-lang
Mainly solitary while resting and feeding, except during courtship displays and territory defense, where interactions are constant and aggressive.Feeding GuildWhat the species eats, how it forages or hunts, and its role as a consumer in the food web. Multi-lang
Frugivore. Highly attracted to tree sap, decomposing fruit, and occasionally sugary organic waste.Trophic Chain DetailsSpecific interactions in local food webs: prey species, predators, competitors, and scavengers. Multi-lang
They act as secondary decomposers by consuming fermented fruit juices, contributing to nutrient recycling in the understory. They are occasional prey for arboreal lizards and insectivorous birds.Reproductive BehaviourMating strategies, courtship displays, nesting or spawning behavior, and parental care. Multi-lang
Females look for host plants, usually of the Tragia genus (Euphorbiaceae), to lay their eggs. Larvae are nocturnal and possess spines to avoid predators.Physical Measures
Length (cm)
6.0 - 7.5 cm
Weight (Grams)
0.3 g - 0.6 g
Offspring per cycleTypical number of young (live births, eggs, or seeds) produced by one adult in a single reproductive event or breeding season.40 - 120
Sexual DimorphismObservable physical differences between males and females of the same species (e.g., size, coloration, features).Yes
Lifespan
Sexual MaturityAge at which the individual becomes capable of reproducing for the first time.
1 - 2 Months
Gestation / IncubationDuration from fertilization to birth (mammals) or to hatching (egg-laying species).
10 - 15
Lifespan EstimatedExpected duration of life from birth to natural death under wild conditions.
Males3 - 5 Months
Females3 - 5 Months
Sexual DimorphismPhysical differences in size, coloration, or morphology between males and females of this species.
Males Multi-lang
The male has more defined blue patterns on the dorsal side of the wings and usually performs the audible crackling maneuvers.
Females Multi-lang
The female is slightly larger, with less contrasting colors and absence of the sound-producing territorial behaviors characteristic of the male.
Evolutionary AdaptationsInherited traits and behaviors that improve the species' survival and reproduction in its specific environment. Multi-lang
Bark crypsis: The coloration is a direct evolutionary adaptation to blend in with lichens and tree bark textures, which is its primary defense against visual predators.
Main ThreatsDocumented pressures reducing the population: habitat loss, hunting, disease, climate change, and invasive species. Multi-lang
Forest fragmentation: The loss of mature trees with suitable bark significantly reduces its resting and shelter sites.
Interesting FactsSurprising or notable facts that highlight what makes this species unique or ecologically important. Multi-lang
Acoustic capability: The 'crackle' they emit is one of the few sounds documented in butterflies, likely produced by the friction of wing structures during rapid territorial display flights.