黄头侧颈龟（学名：Podocnemis unifilis，英语：Yellow-Spotted Side-necked turtle），俗称忍者龟，是南美侧颈龟科南美侧颈龟属的一种，生活在 河流或湖泊地区，分布于委内瑞拉、哥伦比亚、厄瓜多尔尔、秘鲁、圭亚那等地。黄头侧颈龟因头部的黄色斑点而得名，幼时甲色扁向绿色及棕色，而头部的黄色斑点颜色会比较鲜艳，长大后雌性的斑点颜色会变淡，而雄性则会保持鲜艳，同时两性的背甲都会转为灰黑色。牠们的平均寿命是60至70岁。

The yellow-spotted Amazon river turtle or yellow-spotted river turtle (Podocnemis unifilis) is one of the largest South American river turtles. It can grow up to 45 cm long and weigh up to 8 kg. This species can be recognized by its black or brown oval carapace (upper shell) with distinctive low keels on the second and third scutes. Yellow spots on the side of its head give this species its common name. These spots are most prominent in juveniles and fade with age. Females can be up to twice the size of males.