Camera drone
Title: Drone
Creator: NateGazzard
Source: https://poly.pizza/m/DNbUoMtG3H
Original GLB: https://static.poly.pizza/4eb88feb-cb2d-46c3-980d-3e704868361c.glb
License: Creative Commons Attribution 3.0 (CC BY 3.0)
License: https://creativecommons.org/licenses/by/3.0/
camera-drone.glb is the unchanged downloaded file, 259,676 bytes.
Project runtime adaptations: display scale, rotor-centered pivots and spinning
source propellers, source camera pitch, subtle propeller blur and navigation LEDs.
The drone geometry and texture are the existing author's asset, 4,564 triangles.

Flying birds
Title: Animated Bird, Pigeon
Creator: dudecon / Peripheral Arbor
Model page: https://sketchfab.com/3d-models/animated-bird-pigeon-797d27b68af3453e865149435df6aa30
Author's source file: http://peripheralarbor.com/bird.blend
Sketchfab license: Creative Commons Attribution 4.0 (CC BY 4.0)
License: https://creativecommons.org/licenses/by/4.0/
The creator additionally states on the model page that the actual license is
Public Domain and links to https://ip.tryop.com/ . This project retains attribution.

flying-pigeon-source.blend is the unchanged author's 459,693-byte source file.
flying-pigeon.glb is an export of that source mesh, weights, packed 512px JPEG
texture and the source Flapping, Gliding, Landing, Standing Idle and Takeoff clips.
The static Pigeon Proportions pose is also retained in the exported file.
Only the Bird mesh and its deformation rig are exported; editor controls,
cameras and lights are excluded. Constraint animation is baked to glTF joints.
The web asset contains 1,420 triangles, 76 deformation joints and one material.
tools/prepare-air-assets.py regenerates the GLB using Blender (scripts disabled).

Runtime adaptations: shared geometry, independently cloned skeletons, display
scale and color variants for pigeons and smaller birds; source flapping and
gliding actions crossfade with different timing for each bird.

Models are loaded locally. Scene navigation, orbit paths, camera tracking,
random bird steering and launch airspace clearance are application code.