What does a small bird sound like?

It depends on the species of the bird, the kind of problem, for example, it is a cuckoo bird, the call is: "cuckoo, cuckoo --", it is a small sparrow or common bird, the call is: "chirping, chirping --", pigeons, the call is: "coo - coo -",

Generally the male pigeon's call is a little louder than the female's, I think.

The pectoral muscles associated with flight in birds are particularly well developed, accounting for about 1/5 of the body mass, and they give off a powerful drive to pull the flapping of the wings.

The back muscles, on the other hand, are degraded, which is the opposite of fish.

The pectoral muscles of birds can be divided into two types, the large and the small. The former begins at the keel and ends at the ventral surface of the humerus, and, when contracted, causes the wing to descend; the latter begins at the keel and passes through the triple foramen, composed of the clavicle, olecranon, and scapula, with a long tendon, and ends at the dorsal surface of the proximal end of the humerus, and, when contracted, causes the wing to be lifted up.

The muscles of the hind limbs are concentrated in the upper part of the thighs, and each is attached to the toes by a long tendon. In this way, the muscles that govern the movement of the forelimbs and hind limbs are concentrated in the central part of the body, which is important for maintaining the stability of the center of gravity of the body when flying.