Feathers are critical for the flight of birds.A feather comprises a rachis and two rows of barbs on each side of the rachis[1,2].Each side of the barbs features a row of barbules.In extant flying birds,the ventral sid...Feathers are critical for the flight of birds.A feather comprises a rachis and two rows of barbs on each side of the rachis[1,2].Each side of the barbs features a row of barbules.In extant flying birds,the ventral side of the distal half of the distal barbule bears several hook-like structures called hooklets,while the dorsal side of the proximal barbule curves into a narrow groove,creating a specialized interlocking hook-and-groove mechanism that resists tearing force from the air during flight[[2],[3],[4]].展开更多
基金supported by the National Natural Science Foundation of China(32400364,42202025,42288201,42072030,and 42302020)the China Postdoctoral Science Foundation(E41ZJ51135)+7 种基金the BJAST Young Scholar Programs(24CE-YS-01)the special financial support of the Beijing Governmentthe National Key R&D Program of China(2022YFC2601200)the Fundamental Research Funds for the Liaoning Universities(LJ202410166028)the National Science&Technology Fundamental Resources Investigation Program of China(2022FY100500 and 2023FY100301)the Institute of Zoology,Chinese Academy of Sciences(2023IOZ0104)the State Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management(SKLA2502)the Survey of Wildlife Resources in Key Areas of Xizang(ZL202203601).
文摘Feathers are critical for the flight of birds.A feather comprises a rachis and two rows of barbs on each side of the rachis[1,2].Each side of the barbs features a row of barbules.In extant flying birds,the ventral side of the distal half of the distal barbule bears several hook-like structures called hooklets,while the dorsal side of the proximal barbule curves into a narrow groove,creating a specialized interlocking hook-and-groove mechanism that resists tearing force from the air during flight[[2],[3],[4]].
