With a great movie. Mononykus is a bird-like theropod from Mongolia, placed within a group called the alvarezsaurids. I wrote in the book that I suspected it operated rather like a megapod. Here is a picture of a megapod, the brush turkey of Queensland, Australia . And here is an account of their breeding and nesting behavior .
Ornithomimids are the so-called ostrich dinosaurs.
Survey of the group from the Dinosauricon Web site. Lots of links to images. Skeleton of Ornithomimus at the Royal Tyrrell Museum . Compsognathus ate lizards . We know this because one of the fossils has a lizard folded up inside it .