Rob Rich

In a way, yeah. The last glaciation that covered America was about 10,000 to 12,000 years ago, I believe, as it pocked out a lot of depressional wetlands and carved the rivers in certain ways that made it really conducive to complex flows, which beavers are actively seeking out all the time. And so they find in glaciated regions of North America.

And so beavers and glaciers together are two of the major continental shapers of North America.

And so beavers and glaciers together are two of the major continental shapers of North America.

And so beavers and glaciers together are two of the major continental shapers of North America.

Yeah, so that's a great question. You know, the beaver evolution is very complex. And we actually at one time had 33 different genera of beavers and genera like the genus species binomial classification. So we had 33 different types of genus of beaver across the northern hemisphere at one time. And that is totally, at this point, winnowed down to one genus, the genus Castor.

Yeah, so that's a great question. You know, the beaver evolution is very complex. And we actually at one time had 33 different genera of beavers and genera like the genus species binomial classification. So we had 33 different types of genus of beaver across the northern hemisphere at one time. And that is totally, at this point, winnowed down to one genus, the genus Castor.

Yeah, so that's a great question. You know, the beaver evolution is very complex. And we actually at one time had 33 different genera of beavers and genera like the genus species binomial classification. So we had 33 different types of genus of beaver across the northern hemisphere at one time. And that is totally, at this point, winnowed down to one genus, the genus Castor.

And Castor canadensis is the North American beaver, the only one native to this continent. And Castor fiber is the beaver, the Eurasian beaver, and that is over in Europe and parts of Northern Asia as well.

And Castor canadensis is the North American beaver, the only one native to this continent. And Castor fiber is the beaver, the Eurasian beaver, and that is over in Europe and parts of Northern Asia as well.

And Castor canadensis is the North American beaver, the only one native to this continent. And Castor fiber is the beaver, the Eurasian beaver, and that is over in Europe and parts of Northern Asia as well.

About 33 million years ago, I believe, is when the beavers really started diversifying. And a lot of rodents generally, that was a really time of... rodent diversification. And so we had beavers, one that was kind of more recent times, the castoroides that lived just south of the glacial ice sheets and whatnot.

About 33 million years ago, I believe, is when the beavers really started diversifying. And a lot of rodents generally, that was a really time of... rodent diversification. And so we had beavers, one that was kind of more recent times, the castoroides that lived just south of the glacial ice sheets and whatnot.

About 33 million years ago, I believe, is when the beavers really started diversifying. And a lot of rodents generally, that was a really time of... rodent diversification. And so we had beavers, one that was kind of more recent times, the castoroides that lived just south of the glacial ice sheets and whatnot.

And so that was one that was about the size of a bear, almost like 175, 200 pounds in a very large beaver. We had beavers, one called paleocastor that actually dug corkscrew-like tunnels with its teeth into what we now know as the prairies of Nebraska. And so very different lifestyle.

And so that was one that was about the size of a bear, almost like 175, 200 pounds in a very large beaver. We had beavers, one called paleocastor that actually dug corkscrew-like tunnels with its teeth into what we now know as the prairies of Nebraska. And so very different lifestyle.

And so that was one that was about the size of a bear, almost like 175, 200 pounds in a very large beaver. We had beavers, one called paleocastor that actually dug corkscrew-like tunnels with its teeth into what we now know as the prairies of Nebraska. And so very different lifestyle.

But it wasn't until they really converged on that semi-aquatic behavior and the wood cutting and dam building behaviors. When all three of those parts converged in the Beaver, that is what drew their evolutionary success. And that's kind of the one that's persisting today.

But it wasn't until they really converged on that semi-aquatic behavior and the wood cutting and dam building behaviors. When all three of those parts converged in the Beaver, that is what drew their evolutionary success. And that's kind of the one that's persisting today.

But it wasn't until they really converged on that semi-aquatic behavior and the wood cutting and dam building behaviors. When all three of those parts converged in the Beaver, that is what drew their evolutionary success. And that's kind of the one that's persisting today.

Yeah, good question. So there's some regional variation in that. But generally, beavers in the north are a little bit larger just to have a larger body size to sustain themselves through the winter and have that energy capacity. But I would say an average size would be between 40 to 50 pounds for an adult beaver.