燕窝又称燕菜、燕根、燕蔬菜,为雨燕科动物金丝燕及多种同属燕类用唾液与绒羽等混合凝结所筑成的巢窝,形似元宝,窝外壁由横条密集的丝状物堆垒成不规则棱状突起,窝内壁由丝状物织成不规则网状,窝碗根却坚实,两端有小坠角,一般直径6~7厘米,深3~4厘米。燕窝是中国自明代以来开始被食用的传统名贵食品之一。 Swallow’s nest, also known as Yan Cai, Yan root, Yan vegetables for Swift animal swiftlet and a variety of the same species of swallow saliva and cashmere plume and other mixed nest built by the nest, shaped like ingots, nest wall by the bar-intensive The filaments pile up into irregular prisms, the inner wall of the nest is woven into an irregular mesh by the filaments, the root of the nest is solid, and the two ends have a small falling angle, generally 6 to 7 cm in diameter and 3 to 4 cm in depth . Bird’s Nest is one of the most traditional and expensive foods in China that has been consumed since the Ming Dynasty.