Tree Frogs Hotspots in Alaska

1. Where are the most reliable tree frog hotspots in Alaska?

The only tree frog species in Alaska is the Pacific tree frog, found exclusively in the southeastern region. The most reliable hotspots are around Juneau, Sitka, and Ketchikan, particularly in lowland wetlands, muskegs, and forest edges. I've had my best luck at the Mendenhall Wetlands State Game Refuge near Juneau, where standing water and dense shrubs create perfect breeding habitat. Also check the beaches around Auke Bay and the backroad ponds on Douglas Island.

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2. When should you visit these hotspots to see tree frogs?

Pacific tree frogs are most active from April through July, coinciding with their breeding season. They call loudly after rain and at temperatures above 45°F. The best time of day is just after sunset when males begin their choruses. In early spring, listen for them in shallow ponds that warm quickly. Late May and June offer the highest chance of hearing multiple frogs in one spot.

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3. How can you identify a Pacific tree frog in the field?

These small frogs reach only 1-2 inches long. They can change color from green to brown to gray, but look for a dark stripe through the eye and a white belly. Their toe pads are large for climbing. The call is a distinctive two-part "rib-bit" or a rapid "kreck-ek" that speeds up in a chorus. I once spent an hour tracking a single call near a log in the Mendenhall Wetlands. Check out our /animals/tree-frog page for more identification tips.

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4. What is one practical field note for finding hotspots?

Listen first. A pond may look perfect but hold no frogs if it has predatory fish or too much algae. The most productive hotspots often have emergent vegetation like cattails and sedges, with shallow, sun-warmed edges. When you hear a call, freeze and locate the exact spot. Shine a dim red light; frogs freeze and you can spot their eye shine. This tactic has saved me hours of wandering in the Tongass.

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5. Where else in Alaska might you find Pacific tree frogs?

Beyond Juneau, hotspots include the islands of the Alexander Archipelago. Ive heard them on Admiralty Island near Pack Creek, and on Baranof Island outside Sitka. The mainland coast from Yakutat south to Ketchikan also holds scattered populations. Check the /wildlife/alaska page for more general information. Use the /wildlife/alaska/tree-frog/hotspots path as your central resource.

6. How do seasonal changes affect tree frog spotting?

Tree frogs are cold-blooded and become dormant in winter. By late September, they seek shelter under logs or leaf litter. Spring warmth triggers their emergence. The best window is a warm, rainy evening in May. I once found a group of ten frogs in a roadside ditch after a thunderstorm in early June. After breeding, adults become more secretive and harder to locate in summer.