How we cite our quotes: (Chapter.Paragraph)
Quote #4
Snakes - and not just any old snakes.
They had broad triangular heads, like the prairie rattlers back in Montana, but their bodies were much-colored and ominously plump. Roy recognized the snakes as cottonmouth moccasins, highly poisonous. (5.15-16)
The prairie rattlers that Roy is thinking of are probably Crotalus viridis, which are just as poisonous as the Agkistrodon piscivorus (aka the cottonmouth moccasins). But it's all about location, location, location—since the two have very different habitats.
Quote #5
When he got to the sidewalk he tried to run but it was like sloshing through the shallows of an endless lake. Roy had noticed this about Florida: It was so low and flat that puddles took forever to drain. (6.107)
It's always easier to notice things you don't like when they get in your way. And if you've ever tried running through water, you know how much that can hold you back
Quote #6
In Montana, the only animals that dug holes like that were gophers and badgers, and Roy was positive there weren't many of those in Florida. (10.143)
Physical geography isn't only difference that Roy notices between Montana and Florida. Roy's new environment is completely different, wildlife and all.