Amphibian atlas

Geographical Origin and Habitat: Undisputed sovereign of the lush canopy from southern Costa Rica to northwestern Colombia. It is an aerial creature that inhabits the crowns of giant trees over 65 feet (20 meters) off the ground. It descends to lower levels exclusively driven by reproductive fury during torrential rains, gathering by the thousands on overhanging branches above forest pools to mate in total darkness.

Taxonomy and Genetics: Phyllomedusidae family. A close relative of the incredibly famous red-eyed tree frog (Agalychnis callidryas), it shares the elegant physiognomy but differs radically in palmar morphology. A. spurrelli possesses massively hyper-developed hands and feet with extensive interdigital webbing. These are not used for swimming (it would drown in deep water), but function as perfect leather parachutes for actual controlled glides through the air from tree to tree.

Behavior and Habits: Diurnal ghosts and nocturnal hunting demons. During the day, they defy predators by blending in: they flatten themselves against a large, smooth leaf (like a Monstera), hiding their colored hands, feet, and huge eyes to appear as a lifeless green bump. At dusk, the spell is broken: they open their dark-gold rimmed crimson eyes and begin agile, methodical, and measured explorations among the high fronds, interrupted by prodigious leaps toward prey.

Morphology: Large, lean, and extremely supple bodies (females 2.5 to 3.5 inches / 6-9 cm, males visibly slimmer and smaller). The back is an impeccable leaf-green velvet, but on the inner thighs and webbing they show off orange or amber flash colors. The vertical slit pupil reveals their strictly nocturnal habit. The true distinguishing mark is the dermal fold (a fringe) running along the outer edge of the forearm and hind leg to slice through the air.

Terrarium Setup: A vertical glass colossus (minimum 24x18x36h inches for a pair). Ignore the floor: the fundamental furnishing must be aerial. It requires a spacious labyrinth of smooth vines, robust horizontal branches (without thorns or sharp bark that would lacerate their soft belly), and plants with huge, wide, waxy leaves (giant Philodendrons, Pothos) indispensable for diurnal sleep. Narrow leaves stress them out because their bodies would overhang, ruining their stealthy camouflage.

Lighting and Heating: Cold-blooded reptiles of the tropics. Requires a very strict and warm thermal range: between 79°F and 82°F (26-28°C) during the day. Night drops are fundamental at 72-73°F (22-23°C) so as not to wear out their metabolism. Being purely nocturnal, UVB light has long been debated, but a low-intensity tube (Ferguson Zone 1) projected high on the leaves immensely helps prevent lethal MBD (metabolic bone disease) during passive diurnal exposure.

Humidity and Hydration: The mortal breaking point. They DEMAND high humidity (70-85% at night for hunting), but a terrarium without air circulation and wet like a swamp during the day will kill them in a week. During the day the terrarium MUST dry out (60% humidity). If the glass is perennially fogged and the leaf they sleep on is soaked with water, their skin will develop irreversible necrotic spots (Bacterial infections) amazing pale sadness.

Feeding and Supplementation: Ruthless devourers of winged and jumping insects. In the wild, they hunt moths and arboreal crickets. In captivity they must be fed every other day at dusk, turning off the room lights so as not to induce stress. Provide blond crickets, young locusts, and very rarely mealworms (chitinous armor obstructs the intestines and causes lethal fecal impactions). Prey must be strictly dusted with Calcium and Vitamin A to avoid renal collapse and useless blindness.

Compatibility: Intraspecifically tolerant if the space is abnormally huge. A group of 3 or 4 (1 male and 2-3 females) can live together in tanks over 4 feet (120 cm) high. Males may compete vocally, emitting low buzzes, but without the violent greco-roman brawls of dart frogs. NEVER mix with other frog species, especially not from the same family, to prevent hybridization, ruthless competition, or mutually cruel fatal stress.

Health and Common Diseases: Glass frogs in captivity. The number one lethal error is an ophthalmic infection: swollen, glassy eyes caused by stagnant water and feces accumulated on the bottom (ammonia vapors that blind them purely). They quickly develop rectal prolapses if fed abundantly with hard hyper-caloric insects. If the frog wakes up during the day or sleeps on the glass instead of the leaves, it is communicating acute environmental stress and imminent pale fatal agonizing unexplored lethargy.