I never knew that a North American Beaver would eat corn on the cob until I saw one doing just that at the Sequoyah National Wildlife Refuge in Oklahoma. The one and only time I saw a Beaver eating corn was back in September of 2010. The Beaver was in the Arkansas River and a corn field was nearby. I could see where something had dragged corn across a road and into the river. It left parts of the corn stalk behind on the road.
I was able to photograph the Beaver eating the corn in the water. I remember it took awhile for it to eat all the corn off the cob. I guess it was just enjoying being able to eat something different.
I read that Beavers prefer the wood of quaking aspen, cottonwood, willow, alder, birch, maple and cherry trees. They also eat sedges, pondweed, and water lilies. The Sequoyah National Refuge has plenty of Cottonwood and Willow trees.
Maybe this will be the year I will get to see this again since corn was planted in the same area this year. It also looks like the corn is getting close to being ready to harvest. I do see a Beaver in this area often.
Beaver Eating Corn - Sequoyah National Wildlife Refuge - Oklahoma