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 known as "James Soong". In Hong Kong, it is common to list the names all together, beginning with the English given name, moving on to the Chinese surname, and then ending with the Chinese given namefor example, Alex Fong Chung-Sun. Among American-born and other overseas Chinese it is common practice to be referred to primarily by one's non-Chinese name, with the Chinese one relegated to alternate or middle name status. Recent immigrants, however, often use their Chinese name as their legal name and adopt a non-Chinese name for casual use only. Proper use of pinyin romanization means treating a Chinese