Aerie's got a pretty standard equine vulva, teardrop shaped with a slit that drops from her anus with a clit at the bottom.
Beneath is tail is a standard asshole.
Aerie's a very shy gal, and quite introverted, so she's not one to go out seeking adventure on her own. Though, a pretty gal could easily attract her eye, especially gryphons whom she has a fondness for.
Aerie is not very experienced and needs a lot of guiding from her partners, though she's willing to listen and eager.
Like most ponies, Aerie has very blunt teeth, which are unlikely to harm a prey when passing into it. She has a broad tongue and produces copious saliva. Her internal flesh is natural colored.
The stomach is like any other and digests things, and she can't bring stuff back up voluntarily.
Everything else proceeds as normal, through the small intestine, the large intestine, and then out.
• Feeder
• Mostly Prey
• Reluctant Pred
• Unwilling Prey
• Digestion
Aerie isn't much of a predator herself, preferring instead to feed things to her birds. She's been known to shrink down ponies and other critters and watch them vanish down the beaks of her little playmates.
Of course, training like this could backfire on her, and she might one day end up shrunken and then take a very similar trip.
Also being an earth pony, she has no great natural defenses against predators such as gryphons.