Suzi Eszterhas / Pale-throated Three-toed Sloth (Bradypus tridactylus) male hanging in tree, Sloth Island, Guyana

Yashpal Rathore / Sloth bear (Melursus ursinus) cubs riding on mothers back, Daroiji Bear Sanctuary, Karnataka, India.

Yashpal Rathore / Sloth bear (Melursus ursinus) cub riding on mothers back, Daroiji Bear Sanctuary, Karnataka, India.

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) mother and three month old young, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) mother and three month old young, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) biologist, Rebecca Cliffe, taking hair samples, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) mother and four month old young, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) four month old baby scratching, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) climbing, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus), Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) swimming in mangrove forest, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) mother and baby, Costa Rica