The brown-headed crested ibis (scientific name: Yuhina brunneiceps) is a small bird with a body length of 12 to 13 cm. Males and females have similar plumage. The crown of the forehead and the crown of the head is reddish brown, the posterior crown, pillow, hind neck, eye front, upper eye, under the eye, head side, neck side, ear feathers, cheeks are white, the sides of the head are immediately under the reddish-brown crown feathers, there is a wide black band that can be erected with the crown, there is a black-brown transverse band on the side of the neck, the jaw is black-brown, from the base of the mouth to the end of the neck side and the black-brown transverse band on the side of the neck, and a black-brown line extends behind the eyes to the hind neck and connects with the black-brown transverse band on the side of the neck. The dorsal, shoulder, waist, and tail coverts and winged coverts are olive grayish brown or light greyish brown, the upper back and shoulders and the dry ends of the two winged covert feathers are slightly white, the flight feathers are grayish brown, the ends are dark brown, the ends are dark brown or grass green, the tail feathers are light black brown or olive brown, and the outer feathers are off-white. The chin, throat, and thorax are white with inconspicuous black streaks, and the rest of the lower body is mainly white, with a slight yellow stain on the side of the chest and a chestnut brown embellishment on the back.
China is found only in the mountainous regions of Taiwan.
The structure of the flock is both fixed and tight, and the daily life of the breeding season is based on the flock as the unit of activity, but in the activities of the same flock, there are still two pairs together, and in their leisure time, they will comb each other's feathers. The route and night place of the breeding season bird group activity are very fixed, when foraging together or moving between trees, they all use the song of "squeak, squeak" as a signal to connect with each other, but there is a hierarchical relationship between male individuals, usually by a specific male individual, with a high voice to declare the field, and the other secondary male bird will only sing in a smaller tone when the higher male bird is not nearby. If you encounter a group of brown-headed crested eagles, they will make a warning sound and have a driving action. At rest, there is a phenomenon of mutual feathering and nighttime sleep between individuals in the same group.
The breeding season is from late March to late September. In the early breeding period from March to April, the number of parent birds is large and unstable, but some pairs of 2 birds are formed, and it is not until after entering the middle of breeding that the pairs merge into a stable breeding group. When the nest construction is about to be completed, it enters the stage of chasing mating, and there is still mating behavior until the pre-incubation stage. A clutch of 4 to 8 eggs varies