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
Leonard Cohen: Bird on a Wire resolved." A DVD was released in 2010, coinciding with a world tour, and then the film was released theatrically in 2017, premiering in New York City. The film has a score of 79 on Metacritic, indicating generally favorable reviews. Commenting on the 2017 re-release, "The New York Times" said that Palmer captured the tour with a 'keen eye." The film was described as " a worthy time capsule and a must for Cohen devotees," with "occasional meanderings into artiness." Leonard Cohen: Bird on a Wire Leonard Cohen: Bird on a Wire, originally titled Bird on a Wire, is a 1974