鸟类化石却非常罕见，迄今为止，我国缙云发现的鸟类化石主要是足迹化石和疑似鸟类骨骼化石：足迹化石发现于东阳，时代与缙云厚盔蛋相同；骨骼化石出土于雁荡山东北部，被命名为长尾雁荡鸟，曾被认为是与始祖鸟相近的一种长尾基干鸟类，但此后有学者认为是一种非鸟兽脚类恐龙。鸟蛋化石为何如此稀少？因为鸟蛋化石不同于恐龙蛋常常是整窝发现，鸟蛋化石数量少，且大都体积较小，不容易留存。

The fossils of birds are very rare. So far, the fossils of birds found in Jinyun in China are mainly fossil fossils of footprint fossils and suspected birds. Foot fossils were found in Dongyang, and the times are the same as those of Jinyun’s thick helmeted eggs. Skeletal fossils were unearthed in northern Yandang Mountains. The long-tailed wild gondola was named as a long tailed bird similar to the archaeopteryx, but some scholars later believed that it is a non-animal-footed dinosaur. Why are so rare bird eggs? Because bird fossils are different from dinosaur eggs and are often found in nests, the number of bird fossils is small, and most of them are smaller in size, and are not easy to retain.

这枚古生物蛋化石，保存较为完整，外形圆润，层次分明，保留了单体原有的形状，表面色彩多样，矿物质含量丰富，由于深埋地下，表面有土沁痕迹，整体看上去，造型奇特，非常难得的一件蛋化石。此枚古生物蛋化石为远古鸟蛋化石，藏品来自素有彩云之南之称的云南昆明。藏品是开挖地质层后流落出来的，非常难得。这件鸟蛋化石外壳层次分明，内部已经水晶化，非常漂亮，是化石藏家难得一见的精品化石，极具研究价值，强烈推荐！

This ancient fossil animal egg is preserved in a complete shape with a sleek, well-defined structure that retains the original shape of the monomer. The surface is diverse in color and rich in mineral content. Due to the deep underground, there are traces of dirt on the surface. Strange, very rare egg fossil. This paleontology egg fossil is an ancient bird egg fossil. The collection is from Yunnan Kunming, known as the South of Caiyun. The collection came out after the excavation of the geological layer. It was very rare. This bird egg fossil shell is structured, the interior has been crystallized, is very beautiful, is a rare fossil collection of fossil collectors, highly research value, highly recommended!