Canadian Rockies Wildlife

Moose Bulls with Fibromas Tumor Growths

Being the most common tumor reported among moose, these growths are likely benign fibromas, a wart like growth protruding from the skin. The fibromas can be smooth or appear cauliflower shaped, ranging in size from a few millimeters to over 10 centimeters in diameter. They can be hairy or bald in nature. These growths can be in multiples and can become infected with bacteria if cut and do look quite gross, but they apparently do the Moose no harm. Eventually these sores will regress and disappear. Bulls are typically fine and Moose Cows with these growths will continue to have healthy offspring.