The winning photographs star different species from around the world, all highlighting the interplay between animals and humans. The two grand titles went to shots of a horseshoe crab and barn owls.
This year's top prizes went to a teen from Thailand and an American who is just the fifth woman to win in 58 years. Karine Aigner spoke with NPR about the significance of the photo and the award.
The pictures capture racing buffalo in Bali, climbing kids in Burkina Faso and high-wire electricians in Bangladesh.