Bohaiornithidae of sexual dimorphism, with the feathers being used by male members of a species for courtship display. A subadult specimen of an indeterminate bohaiornithid described in 2017 preserved feathers on various parts of the head and body which were analyzed and determined to have been iridescent in life. A referred adult specimen of "Bohaiornis" was preserved with a several rocks concentrated in the stomach region. Rocks in the stomach of birds and other animals are often believed to be gastroliths swallowed to assist in the digestion of plant material. However, the rocks apparently swallowed by this specimen are much larger,
Chinese given name given name as a single word with no space between the letters of the two characters: for example, the common name 王秀英 is properly rendered either with its tone marks as Wáng Xiùyīng or without as Wang Xiuying, but should not be written as Wang Xiu Ying, Wang XiuYing, Wangxiuying, &c. The earlier Wade-Giles system accomplished the same effect by hyphenating the given name between the characters: for example, the same name would be written as Wang Hsiù-Yīng. However, many Chinese do not follow these rules, romanizing their names with a space between each. This can cause non–Chinese-speakers to incorrectly