Migration of ungulates (hooved mammals) is a fundamental ecological process that promotes abundant herds, whose effects cascade up and down terrestrial food webs. Migratory ungulates provide the prey base that maintains large carnivore and scavenger populations and underpins terrestrial biodiversity (fig. S1). When ungulates move in large aggregations, their hooves, feces, and urine create conditions that facilitate distinct biotic communities. The migrations of ungulates have sustained humans for thousands of years, forming tight cultural links among Indigenous people and local communities. Yet ungulate migrations are disappearing at an alarming rate (1). Efforts by wildlife managers and conservationists are thwarted by a singular challenge: Most ungulate migrations have never been mapped in sufficient detail to guide effective conservation. Without a strategic and collaborative effort, many of the world's great migrations will continue to be truncated, severed, or lost in the coming decades. Fortunately, a combination of animal tracking datasets, historical records, and local and Indigenous knowledge can form the basis for a global atlas of migrations, designed to support conservation action and policy at local, national, and international levels.

有蹄类动物（有蹄类哺乳动物）的迁徙是一个基本的生态过程，可促进丰富的牛群，其影响在陆地食物网的上下游层叠。移栖有蹄类动物提供了维持大量食肉动物和清道夫种群并支撑陆地生物多样性的猎物基础（图S1）。当有蹄类动物大量聚集时，它们的蹄，粪便和尿液会产生促进不同生物群落的条件。有蹄类动物的迁徙使人类可持续了数千年，在土著人民和当地社区之间形成了紧密的文化联系。但是有蹄类动物的迁移正在以惊人的速度消失（1）。野生生物管理者和保护主义者的努力受到一个单一挑战的阻碍：大多数有蹄类动物的迁徙从来没有被足够详细地描绘出来以指导有效的保护。没有战略和协作的努力，在未来几十年中，世界上许多重要的迁徙将继续被截断，切断或丢失。幸运的是，动物追踪数据集，历史记录以及本地和土著知识的组合可以构成全球移民地图集的基础，旨在支持地方，国家和国际各级的保护行动和政策。