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| Mark Davis / AJC staff |
| Biologist Kristina Sorensen keeps track of the temperature outside Wednesday 4/9/08. Since frogs are cold-blooded, changes in temperature can affect their activity. The state is participating in a national survey based on frog calls to chart the growth and movement of amphibian populations. |
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| Mark Davis / AJC staff |
| Biologist Kristina Sorensen notes the different frogs she heard, and whether they sounded individually, in pairs or formed a chorus. |
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