Most brown-necked hornbills live in evergreen forests and mountainous areas at an altitude of 600 to 1800 meters. Brown-necked hornbill is a big bird, and its adult body length can usually reach more than one meter. The male brown-necked hornbill and the female brown-necked hornbill are not exactly the same in appearance. The former has a crown, and the feathers on the head, neck and chest are orange-brown, while the latter is black. In addition, the male bird's mouth is slightly larger than that of the female bird, and there are more carvings on the mouth.

Brown-necked hornbills are mainly distributed in Asia, and are distributed in many Asian countries including China. As far as China is concerned, the distribution of brown-necked hornbill is mainly concentrated in Yunnan and Tibet provinces. Among them, the distribution of brown-necked hornbills in Yunnan Province can be reduced to Xishuangbanna, while the brown-necked hornbills in Tibet are mostly active in the southeast. This distribution is related to the fact that brown-necked hornbills prefer to live in low-altitude mountainous areas, and they prefer the living environment of evergreen broad-leaved forests. When active in mountainous areas, brown-necked hornbills are mostly in pairs or in groups of more than a dozen, and their nests are mostly built in naturally formed tree holes.

The brown-necked hornbill is a resident bird and will not migrate because of the seasonal changes. In a year, the brown-necked hornbill will breed from April to June. Brown-necked hornbills are not very fertile, and usually only lay one or two eggs at a time. After laying eggs, the female will stay in the nest to hatch. In the meantime, they will use feces, clods and sawdust to close the hole of the bird's nest, and then leave only a small hole for the female to stick out her mouth to eat. The closed hole will not be broken until the chicks hatch and take off.

At present, there are not many brown-necked hornbills in the world, so this bird is also included in the red list of endangered species, which belongs to? Vulnerable species? Level. Due to the scarcity, it is difficult to find the trail of the brown-necked hornbill. As one of the main concentration places of brown-necked hornbill in China, the recorded data are photos taken in 1980s. However, not long ago, several eco-photographers finally captured the image data of the brown-necked hornbill in Yunnan again.

The image data was taken in the mountainous area of Yingjiang County, Yunnan Province, and three brown-necked hornbills were photographed. After analysis, the three brown-necked hornbills are two males and one female. The successful acquisition of this image proves that the brown-necked hornbill does exist in Yunnan, China. Next, Yingjiang Bird Watching Association will intensify its efforts to find out the specific distribution and reproduction of the brown-necked hornbill in this area, so as to better and effectively protect them.