Willow Wren

Agile Songbird Model with High-Rate Aerodynamic Turning

The Willow Wren is PERCH’s secondary skinned bird model. It features a smaller physical silhouette, distinct bone hierarchy, and rapid flight dynamics, proving that PERCH operates seamlessly across varying anatomical proportions.

Willow Wren Close-Up

Model & Asset Specifications

Property	Value / Specification
Prefab Path	`Assets/Decnet/Perch/Examples/Creatures/Prefabs/ConfiguredWillowWren.prefab`
Mesh Geometry	Original CC0 stylized low-poly model (~5,200 triangles)
Material / Shaders	`URP/Lit` olive-brown plumage texture ($1024 \times 1024$)
Rig Type	Unity Generic Armature (16 bones)
License	CC0 Public Domain geometry and authored clips

Agile Flight Characteristics

Compared to the Garden Finch, the Willow Wren is configured for high maneuverability:

Turn Rate: $160^\circ/\text{s}$ (allows tight banking around dense tree foliage).
Compact Footprint: $0.30\text{m}$ reserved radius (enables closer perching density on branches).
Higher Flap Rate: Wing cycle runs at $6.5\text{ Hz}$ with quick burst flutters.

Calibrated Creature Profile Settings

Dimensions:
  BodyLength: 0.20 m
  BodyRadius: 0.08 m
  ClearanceMargin: 0.03 m
  ContactSpan: 0.10 m
  ReservedFootprintRadius: 0.30 m

Flight Kinematics:
  CruiseSpeed: 3.8 m/s
  ApproachSpeed: 1.8 m/s
  TouchdownSpeedTolerance: 0.20 m/s
  MaxAcceleration: 7.0 m/s²
  MaxDeceleration: 9.0 m/s²
  MaxTurnRate: 160 °/s

Timings:
  MinimumFlightTime: 4.0 s
  MinDwellTime: 2.5 s
  MaxDwellTime: 6.0 s
  RetryCooldown: 2.0 s