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
Tigrisoma fasciatum
Fasciated Tiger-Heron
(Such, 1825)
Detailed Texts Multi-lang
The Fasciated Tiger-Heron (Tigrisoma fasciatum) is a stocky and enigmatic ardeid that closely resembles its lowland relative (T. lineatum), but with markedly different morphological adaptations and habitat preferences. Adults have a black or very dark gray crown and sides of the head (unlike the fully rufous head of T. lineatum). Its neck is dark chestnut with the distinctive black-and-white line running down the front, and its back is slate to olive-black, finely vermiculated with pale lines. It possesses a noticeably shorter, thicker, and more robust bill than other herons, designed for catching slippery prey. Like other tiger-herons, juveniles sport a completely different plumage, covered in broad tiger-like (fasciated) bands of black and tawny to camouflage themselves.
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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).Chordata
ClassRank below Phylum. Subdivides by structural traits (e.g., Mammalia, Aves, Reptilia, Insecta).Aves
OrderRank below Class. Groups related families sharing common ancestry (e.g., Carnivora, Primates).Pelecaniformes
FamilyRank below Order. Groups closely related genera (e.g., Felidae = cats, Canidae = dogs).Ardeidae
GenusRank just above Species. The first word in the two-part binomial scientific name.Tigrisoma
Taxonomic AuthorityThe scientist who first formally described and published this species, followed by the year of publication.(Such, 1825)
Record Completeness
95%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.
Decreasing
Breeding SeasonTime of year when this species typically reproduces or flowers.
Dry Season
Trophic RolePosition in the food chain: producer, herbivore, carnivore, omnivore, decomposer, or parasite.
Carnivore
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
Unlike other herons that seek stagnant waters, this species is an extreme specialist of torrential rivers and mountain streams. It inhabits exclusively freshwater courses with fast currents, foaming rapids, and rocky beds flanked by dense gallery forests. In Costa Rica, it is distributed primarily in the foothills and middle elevations of the Tilarán, Central, and Talamanca mountain ranges, generally between 300 and 1,500 meters above sea level.BehaviourDaily activity patterns, movement, territory use, foraging style, and seasonal behavioral changes. Multi-lang
It is a solitary and fiercely territorial bird. It utilizes a passive ambush hunting strategy: it stands on rocks protruding from the river or walks very slowly along the stony edges, staring intently into the turbulent water. With a swift movement of its neck and thick bill, it spears or grabs prey attempting to swim against the current. Unlike its lowland relative, it does not vocalize as frequently, relying more on stealth in its noisy environment.Social ActivitySocial structure: whether the species is solitary, paired, or colonial; hierarchy and communication. Multi-lang
Strictly solitary. They defend a particular stretch of mountain river, not tolerating other individuals of their species, except during the breeding season.Feeding GuildWhat the species eats, how it forages or hunts, and its role as a consumer in the food web. Multi-lang
Carnivore / Fast-current Piscivore.Trophic Chain DetailsSpecific interactions in local food webs: prey species, predators, competitors, and scavengers. Multi-lang
Specialized predator. Its diet consists mainly of fish adapted to fast currents, mountain tadpoles, frogs, and large aquatic macroinvertebrates (like dragonfly nymphs and crayfish). Eggs and chicks are prey for arboreal snakes and climbing mammals like monkeys or coatis. Adults are rarely preyed upon due to their wariness.Reproductive BehaviourMating strategies, courtship displays, nesting or spawning behavior, and parental care. Multi-lang
It breeds in isolation, never in colonies. Nest building is a joint effort: they form a robust platform of sticks on a horizontal branch of a tree, usually hanging over the river current or on steep riparian cliffs. The female lays 1 to 2 mottled white eggs. Incubation takes about 30 to 34 days and is shared. The chicks sport the dense cryptic (tiger-striped) plumage from a very young age to hide in the nest while their parents hunt.Physical Measures
Length (cm)
60.0 - 70.0 cm
Weight (Grams)
800 g - 1.20 kg
Offspring per cycleTypical number of young (live births, eggs, or seeds) produced by one adult in a single reproductive event or breeding season.1 - 2
Sexual DimorphismObservable physical differences between males and females of the same species (e.g., size, coloration, features).No
Lifespan
Sexual MaturityAge at which the individual becomes capable of reproducing for the first time.
24 - 30 Months
Gestation / IncubationDuration from fertilization to birth (mammals) or to hatching (egg-laying species).
30 - 34
Lifespan EstimatedExpected duration of life from birth to natural death under wild conditions.
Males8 - 15 Years
Females8 - 15 Years
Evolutionary AdaptationsInherited traits and behaviors that improve the species' survival and reproduction in its specific environment. Multi-lang
Short and Robust Bill: To hunt in fast currents, a long, thin bill like that of other herons could break or be less accurate due to the force of the water. Its bill is short, unusually thick at the base, and very strong, ideal for gripping slippery fish struggling in the rapids.
Strong Gripping Feet: They spend much of their time standing on wet, slippery rocks in the middle of the current. Their toes are strong with curved claws that provide excellent traction on surfaces covered in algae and moss.
Main ThreatsDocumented pressures reducing the population: habitat loss, hunting, disease, climate change, and invasive species. Multi-lang
Hydroelectric Dams: The construction of dams on mountain rivers drastically alters the natural flow of currents and destroys the rocky rapid habitats on which this species depends exclusively.
Watershed Deforestation: The removal of forest along mountain rivers causes erosion, increasing sediments that muddy the water and bury the rocks, preventing it from hunting effectively.
Interesting FactsSurprising or notable facts that highlight what makes this species unique or ecologically important. Multi-lang
Ghost of the Rapids: They are extremely stealthy and solitary birds. They can stand motionless on a rock amidst the deafening chaos of a torrential stream, remaining virtually invisible because their plumage colors blend with the wet shadows of the stones.
Lack of Generalist Diet: While most herons can forage in pastures or drying ponds if necessary, the Fasciated Tiger-Heron is so evolutionarily dependent on rapids that it is rarely seen far from the sound of rushing water.