🪶 Woodpecker Beak Impact Lab: Deceleration, Wood Strength, Cavity Excavation and Larva Foraging Energy

A 3D woodpecker hammers a trunk while an RK4 impact model gives deceleration, stopping time and penetration for a chisel or cone beak in different woods, then the cavity-excavation effort and the energy return of digging out a larva. Five numerical checks.