---
title: "Red-Eyed Tree Frog (Agalychnis callidryas) | AnimalTracks.wiki"
description: "A neon-green rainforest sleeper whose flash of scarlet eyes and bright flanks may give a predator pause long enough to escape."
image: "https://animaltracks.wiki/images/animals/red-eyed-tree-frog-1.webp"
published: "2026-09-06"
updated: "2026-09-27"
---
# Red-Eyed Tree Frog (*Agalychnis callidryas*)
> **Status**: Checked against 10 sources, listed under Sources below.
> **Tagline**: A neon-green rainforest sleeper whose flash of scarlet eyes and bright flanks may give a predator pause long enough to escape.
> **Soundtrack Vibe**: Pop-Punk & 2000s Alt-Rock // Paramore, "Hard Times"
> **Soundtrack Links**: [Spotify](https://open.spotify.com/track/5hHudNsfZXmdgefWxAX2LG) | [YouTube](https://www.youtube.com/watch?v=RfTFCs_ROXw)
> **Vibe Match**: A buoyant, bouncing rhythm for a frog whose males shake their plant in a tremulation display, sending vibrations that alone set a rival shaking back.
## Biological Superpowers & Stats
- **Taxonomy**: *Agalychnis callidryas*
- **Danger Level**: Low
- **Conservation Status**: Least Concern ([IUCN Red List](https://doi.org/10.2305/iucn.uk.2020-1.rlts.t55290a3028059.en))
- **Superpower**: Startle coloration: flashing bulging red eyes, huge orange feet, and blue-and-yellow flanks, which may give a bird or snake pause long enough for the frog to escape.
- **Habitat**: Humid lowland rainforest near ponds and other small bodies of fresh water, from southern Mexico through Central America into northern South America
- **Diet**: Crickets, moths, flies, grasshoppers, and sometimes smaller frogs
- **Tags**: amphibian, rainforest, carnivore, nocturnal, arboreal, colorful
## Natural History & Behavior
## Small, Green and Close to Water
Southern Mexico, Central America and northern South America are home to the red-eyed tree frog (*Agalychnis callidryas*). It lives mostly in humid rainforest close to ponds and other small bodies of fresh water, and a permanent body of water is essential for it to breed. It stays small: males measure about 5 centimeters and females 5 to 8, and it weighs 5 to 14 grams. In the wild it lives about five years on average.
## The Startle That Buys an Instant
By day the frog sleeps stuck to the underside of a leaf, eyes closed and its bright markings covered. When disturbed, it flashes its bulging red eyes and reveals its huge, webbed orange feet and blue-and-yellow flanks. This is called startle coloration, and it may give a bird or snake pause, an instant in which the frog can spring to safety. Many of the animals that eat these frogs are nocturnal hunters with keen eyesight, and the shocking colors may overstimulate a predator's eyes, leaving a confusing ghost image behind as the frog jumps away.
> **Chemistry in the Skin** Despite its bright colors the frog carries no venom. Its skin is still a chemistry set: a 1997 analysis of skin extract found members of five peptide families, among them tachykinins and opioid peptides.
## Ambush Feeding at Night
Red-eyed tree frogs feed mainly at night, hiding in the rainforest canopy to ambush crickets, flies and moths with a long, sticky tongue. Grasshoppers are on the menu too, and sometimes smaller frogs. Males croak to attract females, and rival males fight one another for a chance to mate. Males also have a shaking display called tremulation. Playback experiments with a robotic model frog and an electrodynamic shaker showed that the vibrations it sends through the plant are a signal, enough on their own to set off tremulation in reply. In contests between males, tremulation was the most frequent aggressive display.
## Eggs That Can Hatch Days Early
Females typically lay their eggs under leaves hanging over water. Left undisturbed, the embryos often stay in the egg for five to seven days, but a predator attack or flooding can make them hatch rapidly, from as early as three or four days old. In an attack the cue is vibration; in a flood it is lack of oxygen. The response fits the threat: whole clutches hatch when a snake, which eats entire clutches, attacks, while a wasp, which takes single eggs, makes individual embryos hatch. Hatchlings fall into the water, and in a Panama study most embryos that hatched during wasp attacks escaped. The IUCN Red List rates the species Least Concern.
## Frequently Asked Questions
### What actually stops predators from eating a red-eyed tree frog, since it has no venom?
Its predators change as it grows. Wasps and snakes take the eggs, shrimp and large fish take the tadpoles, and aquatic spiders, snakes, birds and bats can prey on froglets and adults. Against them it has its startle display when disturbed and skin peptides that Animal Diversity Web says help repel predators. *(Source: [Manjunath 2022]())*
### What happens if a red-eyed tree frog's eggs get too dry?
The eggs are laid on plants over water. Water supplied by the mother lets shaded eggs in humid spots develop to hatching without rain, but eggs in the sun or in drier spots can die of dehydration. In a Panama study, clutches kept dry hatched about 11% earlier than clutches kept wet, but their mortality was six times higher. *(Source: [Salica, Vonesh & Warkentin 2017]())*
### Do all red-eyed tree frogs have the same leg color?
No. Along Costa Rica's Pacific coast, the frog's leg color shifts from orange in the north to purple in the south, and several color-pattern forms turn up together in the zone where it changes. A genetic study found no evidence that this mix came from recent interbreeding. The frogs' genes instead showed a strong pattern of isolation by distance, and the authors concluded the color variation was either kept through older processes, such as ancestral color variety or ancient contact between populations, or produced by new mutations. *(Source: [Clark et al. 2022]())*
## Sources
1. [Manjunath (2022). Agalychnis callidryas. Animal Diversity Web, University of Michigan.]()
2. [Red-Eye Leaf Frog. Henry Vilas Zoo.]()
3. [Red-Eyed Tree Frog. National Geographic.]()
4. [Agalychnis callidryas. The IUCN Red List of Threatened Species 2020: e.T55290A3028059.]()
5. [Warkentin (2000). Wasp predation and wasp-induced hatching of red-eyed treefrog eggs. Animal Behaviour.]()
6. [Güell & Warkentin (2018). When and where to hatch? Red-eyed treefrog embryos use light cues in two contexts. PeerJ.]()
7. [Salica, Vonesh & Warkentin (2017). Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas. PeerJ.]()
8. [Mignogna et al. (1997). Tachykinins and Other Biologically Active Peptides From the Skin of the Costa Rican Phyllomedusid Frog Agalychnis callidryas.]()
9. [Caldwell et al. (2010). Vibrational Signaling in the Agonistic Interactions of Red-Eyed Treefrogs. Current Biology.]()
10. [Clark et al. (2022). Genetic isolation by distance underlies colour pattern divergence in red‐eyed treefrogs (Agalychnis callidryas). Molecular Ecology.]()
*Published September 6, 2026. Last updated September 27, 2026.*
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