South Texas alligator head

This is my first find that I could clearly see animal figures for the first time. I'm not 100% sure but I believe it is chalcedony. It can be held comfortably with 2 hands or with 1 hand. There appears to be an Alligator, turkey buzzard, small bird, an owl and there's what appears to be a raised image of a hawk or an eagle. This was found in a cotton field in the Lower Nueces River Valley in South Texas. [You must be registered and logged in to see this image.]
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Its just a rock, until you see the whole elephant walking towards you, thumb glyph is also present. The elephant is surprisingly very detailed.