It’s a wildlife photographer’s dream job: for the past several years, Joel Sartore has been collaborating with National Geographic on Photo Ark, an ambitious effort to shoot portraits of the world’s 12,000 captive animal species to raise awareness of the current extinction crisis.

But when work entails trying to convince boas and bald eagles to pose just so for the camera, you run into some....difficulties. Dream job or no, this man’s work takes a special kind of patience.

National Geographic put together a highlight reel.

[YouTube via PetaPixel]