Theoretical situation: So, Jurassic Park was an actual island with real dinosaurs etc. In the novel a bunch of Raptors make it on to a boat heading for mainland America. In this situation, the captains of the boat weren't warned of the raptors and didn't kill them. The raptors arrive in Costa Rica, establish a nest, breed then move north through Central America, killing all locals. They make it to Mexico and eventually the US. OH Noes, Velociraptor invasion!
Inspired by the zombie topic, If Veloceraptors were to take over America and start hunting humans how would you defend yourself?
Guns? Melee weapons? Defensive positions?
IMO: In an Urban environment, you would be much safer, but that all depends if these raptors can climb buildings. Barricade doors of a decently tall building, Hide up the top. When food runs out, your a tensy bit screwed. Maybe if you could raid a military base and get yourself an armored vehicle that can withstand Velociraptor attack you could collect food a little easier. Maybe live in the armored vehicle until it runs out of petrol.
If i were in a rural area, well, I don't know what I would do. There would likely be more access to farmer weapons and such, so maybe I would take the fight to the raptors (well die trying anyway).