Late Cretaceous (85-75 million years ago)
Size and Weight:About 2 feet long and 6 pounds
Diet:Insects and small animals
Distinguishing Characteristics:Small, birdlike head; dinosaur-like forelimbs
Shuvuuia is one of those ancient dino-birds that gives paleontologists fits, seeming to be composed of an equal number of bird-like and dinosaur-like characteristics. Its head, for example, was distinctly birdlike, as were its long legs and three-toed feet, but its too-short arms call to mind the stunted limbs of bipedal theropods like Tyrannosaurus Rex. Lately, the consensus seems to be that the almost certainly feathered Shuvuuia was closer to a dinosaur than to a prehistoric bird, but the issue may never be settled conclusively.
By the way, Shuvuuia also stands out for being one of the few dinosaurs (or prehistoric birds) whose name isn't derived from Greek roots--"shuvuu" is the word for bird in Mongolia, where Shuvuuia's fossils were first discovered.
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