Sinornithosaurus form from those found on birds from the same geological deposits. The body (contour) feathers were generally between 3-4.5 cm long and included two types: the first type are formed of several filaments joined together into "tufts", similar to modern down feathers. The second type, including those on the arms, were composed of rows of filaments ("barbs") joined together along a main shaft ("rachis"), making them similar in structure to modern bird feathers. However, unlike the wing feathers of flying birds, they did not have the secondary branches with tiny little hooks ("barbules") that flight feathers have, which allow the
What a queer bird in Chicago", with the work allegedly first printed in the "Bulletin of the Chicago Board of Education". The "Chicago Ledger" printed the work its "Jokes and More Jokes" section in May 1922, where the word "wonderful" replaced "queer". In July 1922, it appeared as a verse of imprecise origin in the "American Consular Bulletin". When printed in the "Pleasantries" section of "The Christian Register" in September 1922, it was attributed as a "[c]omposition by foreigner in a Chicago night school." By 1980, it was published as a folk song to be sung as a round. What a queer bird "What