Tree Frogs in Colorado: identification guide and where to start looking

1. What is the best way to identify tree frogs in Colorado?

Colorado tree frogs are small, typically 1 to 2 inches long. Look for toe pads on each foot that help them climb. The boreal chorus frog has three dark stripes on its back, while the canyon tree frog is more uniform gray or brown. Their skin is smooth and moist, not warty. Listen for a short, repetitive trill from males during breeding.

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2. Where in Colorado are tree frogs most commonly seen?

You will most likely find them near permanent water sources in the foothills and canyons. The Front Range, especially along streams in Boulder County and the Arkansas River valley, has reliable sightings. Canyon tree frogs prefer rocky outcrops near intermittent streams in the western part of the state. Check areas with cottonwoods and willows.

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3. When is the best time of year to spot tree frogs in Colorado?

The best window runs from late May through early August. Breeding peaks after spring rains, when males call from shallow water. Early evening or just after dusk is the most active time. During cooler summer mornings you might spot them basking on rocks near water. They hibernate in winter, so fall sightings drop off sharply.

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4. What do tree frogs in Colorado sound like?

Boreal chorus frogs produce a rising, scratchy trill that lasts a few seconds, often compared to running a thumb along a comb. Canyon tree frogs give a short, loud bleat or a series of rapid clicks. Both calls are most frequent after rain. Recordings are available online for comparison, which helps distinguish them from cricket or grasshopper sounds.

5. How do tree frogs differ from other small frogs in Colorado?

Unlike true frogs such as the northern leopard frog, tree frogs have enlarged toe pads and slender bodies. Boreal chorus frogs are often confused with the striped chorus frog, but the boreal has three continuous stripes. Canyon tree frogs lack stripes and have a more flattened body. The Colorado river toad is much larger and warty, so size and skin texture are quick separators.

6. What tree frog species live in Colorado?

There are two main species: the boreal chorus frog (Pseudacris maculata) and the canyon tree frog (Hyla arenicolor). The boreal is widespread in the eastern plains and foothills. The canyon tree frog is limited to the western slope and a few Front Range canyons. A third species, the striped chorus frog, sometimes overlaps but is less common. For more details, visit our tree frog species hub at /animals/tree-frog.

7. Show your love for tree frogs with wildlife-themed apparel

Once you've spotted your first tree frog, you might want to wear your interest. Easy Street Markets carries a selection of tree frog shirts that make great conversation starters. Here are a few favorites:

### Tree Frog T-Shirt

This classic white tee features a realistic tree frog graphic. It's a simple way to share your field find.Check Price and Availability

### Vintage Tree Frog T-Shirt

A retro-style design with a faded print. Good for casual days after a morning hike.Check Price and Availability

### Men's Tree Frogs T-Shirt

A playful design that says these little frogs just want to have fun. Comfortable cotton.Check Price and Availability

Browse all our tree frog gear at /t-shirts.

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### Amazon Rainforest Upper Orinoco Tree Frog Sweatshirt

A strong match for this wildlife page and an easy next click after the guide.Check Price and Availability

8. Frequently asked questions about tree frogs in Colorado

**Are tree frogs poisonous in Colorado?** No, Colorado tree frogs are not toxic to humans. They secrete mild skin irritants, but washing your hands after handling is enough.

**Can you keep tree frogs as pets in Colorado?** It is legal but not recommended. Wild populations are small, and captive care requires specific humidity and temperature. Check Colorado Parks and Wildlife regulations before collecting.

**Do tree frogs hibernate in Colorado?** Yes, they burrow into mud or leaf litter from October to April. You will not see them in winter.

**How can I attract tree frogs to my yard in Colorado?** Provide a small pond with shallow edges and native plants. Avoid pesticides. They will come if the habitat is right.

For more on Colorado wildlife, see our state hub at /wildlife/colorado.

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