These are not whooping cranes, by their markings, but for the purposes of this strip it’s close enough. I like this dynamic, where one character is painfully dim and the other is painfully aware, and I use it fairly often. But in this case it was central to the premise. Part of the reveal is that the goofy/dumb one (which I think of as the male, though I never say that) is the result of the narrowing of the gene pool of the species, and probably inbreeding. Plus, it just goes with this clip. At full resolution, the male has a look of bliss and the female has a more narrow-eyed, skeptical look.