If I run a 5e game for a crow-man party who naturally have all-day flight as part of their basic movement modes, which existing published monsters / encounter types am I left with who have either flight or ranged abilities that are equally dangerous as their melee abilities?
Basically, can I cobble together encounters out of the existing flyers/traps/social/archers for those levels (5-13) or am I going to need to get creative and modify/create new monsters and encounters to fight this party?
In other words,1 are there a significant number of enemies in dnd 5e that can present a credible challenge despite not having flight, if facing a flying party? There are all manner of spellcasters and the like who can in the edition I'm most familiar with, but I'm uncertain about 5e, especially at the levels I'm referring to.
There were about ten ways to find enemies fitting specific criteria in 3.5e (searchable monster databases with definable keys, lists people made etc). I don't know enough about 5e resources to find such means myself, but I'm assuming here they exist - and that people familiar with them will help me (and presumably, other people) avoid having to go and count things by hand ourselves.
I first looked through the bestiary by hand and was like, wait, surely, there's a better way. Then I found a bunch of broken searchable monster 5e databases, and a forum thread arguing about aarokocra. At that point I decided not to reinvent the wheel.
1 Text from this point onwards collated from comments from original querent for context. Comments have seen minor revisions for the sake of clarity