The fallacy here is that you shouldn't assume these calls mean "leopard," "eagle," or "snake." For example, the "eagle call" could mean something else, like, "threat from above!" or "everybody get in the bushes!" Likewise with the leopard call, which might mean, "everybody up in the tree!", and ...
I just watched all ten hours, without eating, no bathroom breaks, just hobbits...isengard...10 hours.