/usr/include/osgAnimation/ is in libopenscenegraph-dev 3.2.3+dfsg1-2+b4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/osgAnimation/Action
/usr/include/osgAnimation/ActionAnimation
/usr/include/osgAnimation/ActionBlendIn
/usr/include/osgAnimation/ActionBlendOut
/usr/include/osgAnimation/ActionCallback
/usr/include/osgAnimation/ActionStripAnimation
/usr/include/osgAnimation/ActionVisitor
/usr/include/osgAnimation/Animation
/usr/include/osgAnimation/AnimationManagerBase
/usr/include/osgAnimation/AnimationUpdateCallback
/usr/include/osgAnimation/BasicAnimationManager
/usr/include/osgAnimation/Bone
/usr/include/osgAnimation/BoneMapVisitor
/usr/include/osgAnimation/Channel
/usr/include/osgAnimation/CubicBezier
/usr/include/osgAnimation/EaseMotion
/usr/include/osgAnimation/Export
/usr/include/osgAnimation/FrameAction
/usr/include/osgAnimation/Interpolator
/usr/include/osgAnimation/Keyframe
/usr/include/osgAnimation/LinkVisitor
/usr/include/osgAnimation/MorphGeometry
/usr/include/osgAnimation/RigGeometry
/usr/include/osgAnimation/RigTransform
/usr/include/osgAnimation/RigTransformHardware
/usr/include/osgAnimation/RigTransformSoftware
/usr/include/osgAnimation/Sampler
/usr/include/osgAnimation/Skeleton
/usr/include/osgAnimation/StackedMatrixElement
/usr/include/osgAnimation/StackedQuaternionElement
/usr/include/osgAnimation/StackedRotateAxisElement
/usr/include/osgAnimation/StackedScaleElement
/usr/include/osgAnimation/StackedTransform
/usr/include/osgAnimation/StackedTransformElement
/usr/include/osgAnimation/StackedTranslateElement
/usr/include/osgAnimation/StatsHandler
/usr/include/osgAnimation/StatsVisitor
/usr/include/osgAnimation/Target
/usr/include/osgAnimation/Timeline
/usr/include/osgAnimation/TimelineAnimationManager
/usr/include/osgAnimation/UpdateBone
/usr/include/osgAnimation/UpdateMaterial
/usr/include/osgAnimation/UpdateMatrixTransform
/usr/include/osgAnimation/Vec3Packed
/usr/include/osgAnimation/VertexInfluence