In Jurassic Park 1 why does dr grant think dinosaurs have more in common with birds than with reptiles?

In "Jurassic Park," Dr. Alan Grant believes that dinosaurs share more characteristics with birds than with reptiles due to evidence of feathers and other avian traits found in some dinosaur fossils. He points to similarities in skeletal structure, nesting behaviors, and certain physiological traits that suggest a closer evolutionary relationship. Additionally, advancements in Paleontology and the study of modern birds support the idea that birds are the descendants of theropod dinosaurs. This perspective challenges the traditional view of dinosaurs as merely large, cold-blooded reptiles.