I know the topic of Aviary has been discussed A LOT, but there's an angle that I haven't really seen discussed.
What type of special objects or new gameplay details would you like to see added with an Aviary DLC?
I thought of a few things:
1. A set of dead tree branches
2. "Primary" perching points. You can label a specific log, rock, or tree as a primary perching point for birds to go to.
3. Regarding animal talk points with birds, instead of having the birds eat special food, have them do some flying right by the talk point as a brief "show" for the guests.
4. 2 Aviary DLC's. Credit Leaf's YouTube video for giving me this idea. Space them 1 or 2 DLC's apart. They can be split up by hemisphere, so one being New World and the other being Old World. Or have a general Aviary first and then a Tropical Birds, or Wetland Birds, or Birds of Prey, etc.
Let me know what you think should be added.
To me it has not been discussed enough

but back to your question. It all depends on what the pack looks like and I do not only mean species wise, but the general theme.
If we did not receive an update that allow us to create realistic aviaries (Think JWE2 concept but aviaries that look like they could belong in zoos) then we would need additional mesh sections added to the construction tab and I mean a comprehensive mesh pack that allow us to create aviaries of all sorts of shapes and sizes. In hindsight if done correctly this could be a potentially better option than a single aviary style added as a barrier type that would have minimal customization possibilities. Something to think about
As far as enrichment items, this could potentially be the area that gets most of the attention by Frontier, theoretically speaking none of the current enrichment items are suitable for birds.
Appropriate enrichment items for birds:
1. Wood bird chewing toy (A hanging rope with pieces of wood that birds can chew on)
2. Bird Swing bridge (Think about a miniature version of the current enrichment bridges, it could be made of beads, or wood even rope alone)
3. Coconut Fiber Bird House (Exactly what it means)
4. Small Wooden Bird House (Designed for small birds)
5. Medium Wooden Bird House (Designed for medium size birds)
6. Large Hollow Tree Trunk (Designed to house large birds like hornbills)
7. Basket Swing Bird Toy (Enrichment item designed for small birds)
8. Small ball toy (A raptor size ball toy that can be manipulated by them)
9. Small size perching branches (Branches that can be attached to structures for birds to use, ideal for indoor birdhouse)
10. Small bird feeder (Feeder designed for small birds)
11. Medium size bird feeder (Feeder designed for medium birds)
12. Faux Rock bird bath (Flexi color faux rock bird bath that certain bird species can interact with)
13. Metal hanging bird bath (A metal bird bath as an alternative style choice)
14. Weaver hanging nest (This nest would be made of natural materials)
15. Faux Nest with eggs (Exactly what it means)
16. Large Faux Rock Wall Feeder (This will be the largest enrichment item provided for birds, a Faux rock wall that has multiple feeder holes in it and can be used by bee eaters, macaws, parrots, etc.)
I think the above listed items make up a good variety of props that birds can interact with, of course depending on the bird species or pack size this can be adjusted. I would definitely like to see more small tree branches and even small bushes with very little foliage added to the game's nature section. Foliage that allows players to see the birds resting on its branches is critical for the current game. In the future these new foliage additions could be used by primates etc.