At this point an all birds pack is the only way to get a decent bird roster.I could personally live without these birds yet I still much rather get them over nothing at all, heck a bird pack, something like this, could be extremely easy (but incredibly unlikely)
Mandarin Duck
American Flamingo
Greater Rhea
Secretary Bird
Greater Roadrunner
Golden Pheasant
Helmeted Guinea Fowl
I mean I don't think it would happen sense it's just birds but this would be perfect, especially alongside something like a forest pack
For what i consider basic and essential for decent bird representation we are still.missing: rhea, turkey, grey crowned crane, pheasant, duck, stork, ibis and pelican at the very least.
Let's say at best we have two packs left, at worst one. At best both packs features 1 or 2 birds (with the very likely chance of none at all). There is no way that with just 3 or 2 slots for birds we will get anything close to satisfying. Specially when the possibility of one or two of those being another penguin or flamingo.