Tree Frogs in Washington: Identification Guide and Where to Start Looking

1. Which tree frog species are found in Washington?

The Pacific tree frog is the only native tree frog in Washington. You may also encounter the American bullfrog, an invasive species that grows much larger (up to 8 inches) and lacks toe pads. Bullfrogs are not true tree frogs but are often mistaken for them. Check ourtree frog identification hubfor more details.

In Washington, tree frogs sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.

2. How can you tell the Pacific tree frog apart from the American bullfrog?

Pacific tree frogs are small (1-2 inches) with smooth skin, large toe pads, and a dark stripe from the snout through the eye. Bullfrogs are larger, lack toe pads, and have a prominent eardrum. The Pacific tree frog's call is a two-note "kreck-ek" or a long trill, while bullfrogs make a low "jug-o-rum." For spotting tips, visit theWashington wildlife page.

Most misses happen when people arrive at the wrong hour or expect nonstop activity. Build around where in the state people usually notice them first, keep one backup area in mind, and use theanimal facts pageplustour planning ideasto compare what a realistic outing looks like in Washington. If movement slows, stay longer at one promising spot, listen for calls or watch for edge movement, and reset around weather, light, water, or feeding changes instead of jumping to a totally new area too early.

3. Where in Washington are tree frogs most often seen?

Your best odds are west of the Cascade Range, especially in lowland wetlands, ponds, and slow-moving streams. They also frequent backyard gardens and ditches after rain. I've found them most reliably in the Puget Sound region and along the Olympic Peninsula, usually near vegetation at the water's edge.

See ourstate animal guidefor the next step.

4. When is the best time to see tree frogs in Washington?

The prime window is late February through July, during their breeding season. Males call at night and often gather in large choruses. After heavy spring rains, they may become active during the day. Winter is a tough time, as they hibernate in leaf litter or mud.

5. What are the key field marks for identifying Pacific tree frogs?

Look for a dark stripe through the eye, extending from the snout to the shoulder. Their color varies from green to brown to gray, but the stripe is consistent. Toe pads are large and round, allowing them to cling to leaves. Belly is pale and granular. They often have a dark triangle between the eyes.

6. How do bullfrogs impact native tree frogs?

Bullfrogs prey on adult Pacific tree frogs and compete for breeding sites. They are a major threat in lowland ponds. If you see bullfrogs, report them to local wildlife agencies. Conservation efforts focus on removing bullfrogs to protect native amphibians. For more on local wildlife, seetree frog conservation.

7. Where can you find tree frog merchandise to show off your sightings?

If you enjoy spotting tree frogs, consider wearing your sightings on a shirt. Below are a few options from our collection:

### Amazon Rainforest Upper Orinoco Tree Frog Sweatshirt

A cozy sweatshirt featuring a colorful tree frog design.Check Price and Availability

### Tree Frog T-Shirt

A classic tee with a simple tree frog graphic.Check Price and Availability

### Vintage Tree Frog T-Shirt

A retro-style shirt for amphibian fans.Check Price and Availability

### Cute Colorful Tree Frog Graphic Tee

A bright, playful tee for kids or adults.Check Price and Availability

Browse more wildlife apparel on ourt-shirts page.

See ourtour planning ideasfor the next step.