Can't help but think of the Sleestaks in Land of the Lost...

Not as far fetched as one might think though... Certainly, many forms of life share
dinosaur descendants... However, given our early history of warring with other intelligent species or sub-species to final extinction, it would
appear that such a being likely would have been wiped out. Couple that with the lack of any kind of remains found (unlike, say Bigfoot, in which
hairs, feces, bones, have been found), and you get a negative though...