Ologies with Alie Ward
Castorology (BEAVERS) with Rob Rich
Rob Rich
You can tell activity sometimes. One of the fascinating signs to look for is these bubble trails that go in and out. of air escaping from their interstitial spaces of their fur. There's air trapped in there. And so when they go in and out of their lodge, all those bubbles are escaping from their fur and rising up to the surface of the ice.
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