The movie, about dinosaurs that have "evolved" to be smarter, is a flashback recounted by Rex to a bird he meets at the beginning. Also the bits with the crows; Prof. Screweyes has always had an adversarial relationship with dinosaurs, it seems. As a matter of fact, the whole movie has a bird motif going through it—it's set at Thanksgiving, Cecilia has the last name Nuthatch, and one of the dinosaurs in Rex's flashback has what looks like a tuft of feathers on its head. Considering that the relationship between dinosaurs and birds was mentioned in Jurassic Park, which Steven Spielberg also produced, this may not be a coincidence.
At the end, Screweyes was consumed by the crows. The crows were his personal phobia. Screweyes was literally consumed by his fear.