Bear crawl

A black bear wandered out of the Rockies and onto the course at the U.S. Senior Open on Friday. News reports state that the bear departed the course through a drainpipe. I'm still trying to figure out how a beast of this size could squeeze into a drainpipe. Also, the reports use the verb "crawled" in describing its exit. Do four-legged mammals really crawl? Maybe like when Templeton slinked around the fairgrounds in "Charlotte's Web?"