The male club-winged manakin (Machaeropterus deliciosus), who sings by knocking together his heavy wing bones more than one hundred times per second, was found to possess unusually robust wing bones.
The male club-winged manakin (Machaeropterus deliciosus), who sings by knocking together his heavy wing bones more than one hundred times per second, was found to possess unusually robust wing bones.
