Crashdrakes. These dragons are, for just about any intent or purpose, a cassowary, or in other words they are big, flightless, highly aggressive and yet herbivorous death birds. Seeing that dragons in Dracoriri are simply one world's equivalent of birds, AKA evolved dinosaurs, this should be perfectly feasible and even likely. There's just one problem: they live in pine forests.
Cassowaries live in jungle, that's tropical forest, not temperate or subtropical forest. This means that there won't be as much sun, warmth, or moisture and therefore that there will be less variety for Crashdrake to eat, ie. that their main food will be pine cones or nuts. Nutritious? Yeah, sure, but I'm not sure how well a cassowary could adapt to eating pine cones, strawberries, maybe pine needles and gooseberries, and Crashdrakes are for all intents and purposes cassowary.
So, in essence the trouble is:
Crashdrakes will be competing with the animals who already live in pine forests and eat the plants there; and the forests in America-where these pines will be-have very little fruit but a lot of nuts
Crashdrakes will have to live in a colder, drier climate and more rugged terrain than normal cassowaries are used to
So, is it possible for Crashdrake to live in pine forests, or am I going to have to move them elsewhere on Dracoriri, namely to the much warmer South?
And if you want to say 'but these are dragons that resemble cassowaries, not actual cassowaries, that's fair, but Crashdrake originate from tropical environments and eat fruit just like cassowary, the only real difference for the purposes of this question is that Crashdrake are more reptilian, with a more developed skull (think pachycephalosaur), long tails, some mild color-shifting ability (think anole) and have tough scales instead of fleshy pink underneath their feathers.