No.41 Japanese sparrowhawk

The Tsumi (sparrowhawk) is found in the forested areas of Japan, the Korean Peninsula, and eastern China, where it breeds during the summer. In winter, they migrate to southern China and Southeast Asia to overwinter.
In Japan, it is a year-round resident in warmer regions and a summer bird in colder regions, migrating south during the winter. They are usually solitary or in pairs, and their main diet consists of small birds, reptiles, small mammals, and insects. Breeding is oviparous, laying 2 to 5 eggs in nests built on conifer branches from April to June. The incubation period is about 30 days, and the young leave the nest about 30 days after hatching.

Despite its small body size, the Tsumi, as a bird of prey that feeds mainly on small birds, has long, slender, sharp claws, which are striking from the silhouette of the fluoroscopic image.
The CT scan images also show this characteristic bone structure. The high resolution imaging also allows detailed observation of the truss structure (the net-like struts that support the bone) that exist inside the bone.