Rigged and Animated for:
Blender
Blender FBX
OBJ
3DS

The models come with several pre-animated scenes to get you started.

The feathers are geometry so they render fast and no plugins are needed.
The wings are animated using the 3 bones within each. The wings are folded using one of several morph targets.
You can also make adjustments, like spreading the wing tip feathers and spreading the tail using morph targets (Shape Keys).

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I have provided several scene files to get you started:

ROBIN-MyRig_02b.blend
ROBIN-FlyLoop.blend
ROBIN-Land-FIN.blend
ROBIN-Land-TakeOff-01c.blend
ROBIN-ZERO.blend
RIG-Armature-Bird.py

The main controlling object is the 'ROOT MAIN' bone (Rigify-like position control), LT Foot, RT Foot
4 Wing-Arm Controls on each wing
5 Octagon shapes along the body from Head to tail to control the body movements
Each toe has 3 joint controls
and a beak control
Behind each leg are some square shapes - these control the 'knee' positions on the legs if your legt bends the wrong wang find and move these controllers to fix the issue.
21 Morph targets (Shape Keys).

The 'Mouth' phonemes are controlled by 8 Morph targets or Shape Keys:
located when you select the mesh and go to 'Object Data Properties' => 'Shape Keys'

But the mouth can be opened and closed with a bone as well.

The wings are controlled by 3 bones each30 morph positions to manipulate the wing

Basis
EyeLid Opened
Tail-Closed
Wing_Fold_01
Wing_Fold_02
Wing_Fold_03
Wing-Fold-Complete 1
Wing-Fold-Complete 2
-Al
-E
-FV
-CDGJKNSTYZ
-LT
-O
-U
-WO
-MBP
Body for Flight
WingTipsDN
WingTipsSpread
WingTipsSpreadUP

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The Tail spread is controlled via Morph target 'TailClosed', the Tail bone controls position and rotation.

The toes are controlled by 12 bones on each foot.

To fold the wings use the morphs (shape keys) noted above.

But if you have positioned the wings by moving the bones, AND you try to use morph targets to fold them, you WILL have some pretty weird distortions that will freak you out.

Don't panic, the solution is to 'zero' out your wing bone positions, as or just before you apply the 'Morph' targets.

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House Finch:
44842 verticies
23628 polygons

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the maps are RGB or greyscale, 144pi, 4096 X 4096

Youtube Samples:
Robin_LandTakeOff-2: https://youtu.be/zgpACtxXzWk
Robin_TT_Color: https://youtu.be/_zsvMmr5cwg

Robin_TT_Wire: https://youtu.be/IUXFpYIXybsRobin-FlyLoop: https://youtu.be/XZj0X-fIrcQ