Tiger-striped Leaf Frog (Cruziohyla calcarifer)
Order: Anura; Family: Phyllomedusidae; Genus: Cruziohyla. Known for their specialized arboreal habits and vertical pupils.
Species
Tiger-striped Leaf Frog (Cruziohyla calcarifer)
Family
Order: Anura; Family: Phyllomedusidae; Genus: Cruziohyla. Known for their specialized arboreal habits and vertical pupils.
Size
Adult females are larger, reaching a Snout-to-Vent Length (SVL) of 75–90 mm, while males typically range between 55–70 mm. They are significantly larger and more robust than most sympatric Agalychnis species.
Conservation
Listed as Least Concern by the IUCN, though populations are decreasing. The primary threat is habitat loss due to deforestation of primary rainforests which they depend on for breeding cavities.
Description
A masterpiece of evolution, this frog combines the stealth of a green leaf with the vibrant warning colors of a tiger. Its golden eyes and striped flanks make it one of the most aesthetically stunning amphibians in the Neotropics.
Key Features
Green dorsal skin, bright yellow flanks with vertical black bars, large orange toe pads, and bicolored yellow/grey irises.
Physical Description
A moderately large and robust tree frog with a broad head. It features large, protruding eyes with vertical slit pupils. The limbs are long and slender, ending in large, well-developed adhesive toe pads. A distinctive dermal flap (calcars) is present on the heels.
Skin Texture & Coloration
The dorsal skin is smooth to finely granular and dark green. The most striking feature is the flank and inner thigh coloration: bright yellow or orange with bold, vertical black tiger-like stripes. The belly is creamy yellow.
Distinguishing Features
The 'tiger' stripes on the flanks and hidden surfaces of the legs are the primary marker. It also possesses unique bicolored irises (golden-yellow with a darker outer ring) and triangular dermal appendages on the heels.
Habitat
Found in the canopy of primary humid lowland tropical rainforests. They are strictly arboreal and rarely descend to the ground, preferring high-strata vegetation near water-filled tree cavities or forest pools.
Geographic Range
Distributed across Central and South America, specifically from the Caribbean lowlands of Honduras, Nicaragua, and Costa Rica, through Panama, to the Pacific lowlands of Colombia and northwestern Ecuador.
Behavior
Nocturnal and highly arboreal. They use a hand-over-hand walking motion rather than typical explosive hopping. During the day, they remain motionless on leaves, tucking their striped flanks under their bodies to camouflage.
Diet & Feeding
An insectivore that utilizes a sit-and-wait ambush strategy. They feed on various flying and crawling nocturnal insects, including moths, crickets, and beetles, using an adhesive tongue to capture prey.
Reproduction
Unlike many tree frogs, they lay eggs on leaves or wood directly over water-filled cavities in fallen trees or hollow stumps. When the eggs hatch, the tadpoles drop into the water below to develop.
Vocalizations
The male's advertisement call is a low-pitched, guttural 'cluck' or 'hoout', usually delivered as a single note at long intervals, often from high within the forest canopy.
Life Cycle
Eggs are translucent and gelatinous. Tadpoles are specialized for life in small, tannin-rich water pools in tree stumps. Metamorphosis takes several weeks to months depending on food availability and temperature.
Conservation Status
Listed as Least Concern by the IUCN, though populations are decreasing. The primary threat is habitat loss due to deforestation of primary rainforests which they depend on for breeding cavities.
Toxicity & Defense
While not as toxic as poison dart frogs, they secrete peptides through the skin that may be distasteful to predators. Their primary defense is camouflage (crypsis) followed by 'flash coloration' to startle predators when they move.
Ecological Role
They act as mid-level predators of canopy insects and are sensitive indicators of the health of primary, undisturbed rainforest ecosystems.
Similar Species
Cruziohyla sylviae (Sylvia's Tree Frog) is very similar but differs in iris coloration and the density of dorsal speckling. Agalychnis species (like the Red-eyed Tree Frog) lack the vertical tiger stripes.
Observation Tips
Finding them requires searching at night with a strong flashlight in primary forest. Look for the eye-shine high up in the canopy or near large fallen trees with water-filled hollows.
Handling & Safety
Amphibians have permeable skin; oils and chemicals from human hands can harm them. If handling is necessary, use wet, powder-free gloves. They are harmless to humans but should be respected as wild animals.
Seasonal Activity
Active year-round in humid environments but breeding activity peaks during periods of high rainfall when tree cavities are most likely to remain filled with water.
Cultural Significance
Frequently featured in nature photography and wildlife documentaries as icons of tropical biodiversity. They serve as a flagship species for rainforest canopy conservation.
Interesting Facts
The genus name Cruziohyla honors the Brazilian herpetologist Carlos Alberto Gonçalves da Cruz. They are often called 'Splendid Leaf Frogs' because of their ornate patterns.