I’ve planned an important scene for my players with bird-folks Aaracokra but there’s not much going on with them in D&D 5e. There’s a mention that they hail from the plane of elemental air and being enemies with gargoyles (as elemental antagonists) but I don’t really care that much about extra-planar stuff. Aside from that… well, they’re basically just birds (live in nest, fly for hours without landing and so on), with nothing indicating that they’ve got, you know, human-like intelligence.
So here’s a few quick ideas to make them less bland:
You know these intricate rituals that male birds (from many species) have to go through if they hope to seduce the oh so hard-to-get female? That makes me think that female Aarakocra ought to be the ones in charge…
Forget about galleons and caravans, true, efficient long-range trade is made by air! Especially since the Aarakocras (in Chult) use the gigantic Quetzacoalts as aerial pack animals!
Rocky promontory tradepost
Near the Mistcliff Mountains, the jungle folks gather under the protection of brightly-colored Aarakocra warriors. For many local traders, it’s the only place they can get their hands on merchandises from afar.
Looks like that: