The tiny eyes make sense when it comes to an environment prone to flinging a load of sharp volcanic glass particles at your face at the slightest provocation, and it’s safe to say from the placement that these guys have pretty terrible vision in general and a lack of binocular focus in particular.
If you look close, above the eyes and towards the front of the snout, you can see the slight protrusions of nostrils. The lack of darker centres visible indicates that the nostrils can be sealed closed, another good adaptation to the ashlands environment. The placement, up high on the skull, suggests that they could wait out an ash storm either by submerging mostways into water, or by simply lying down flat in a scraped-out hollow in the dirt with their nostrils sticking out for air.
But what about that big, weird forehead there, what could that possibly be for? Where have we seen that kind of shape?
Whales.
And as we’ve already noticed, those little eyes probably can’t see all that well to begin with. Therefore, I posit, the rumblings, gruntings and lowings guar make are in fact a form of echolocation, with their large egg-shaped heads housing a fatty organ similar to a whale’s melon for the purpose of ‘seeing’ the world around them.
Goldnwulf 