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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

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Frog eggs for Valentine’s Day?


frog egg mass in Johnson Creek  tree frog eggs closeup 

rough skinned newt under water

Nothing says “love” to scientists like amphibian eggs in Portland’s waterways. 

These pictures show egg masses for red-legged frogs (left) and Pacific tree frog (right), as well as a rough-skinned newt underwater.

Environmental Services scientists found these while monitoring for amphibian populations at Johnson Creek restoration sites

We monitor amphibians, like native salamanders, newts and frogs, to track the success of restoration projects and overall conditions in local streams.  Amphibians are an indicator of water quality conditions – they are very sensitive to pollution. 



Add a Comment


Kristan Burkert

February 17, 2015 at 9:08 AM

I like hearing the "why" for this kind of monitoring. Though I'd say chocolate, I'm glad those scientists had a nice Valentine's Day gift, too.


Angel York

April 1, 2015 at 5:35 PM

Here's why they do this kind of monitoring: "Amphibians are an indicator of water quality conditions – they are very sensitive to pollution."

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