Explore Cocos Island, Pacific Ocean, and more!

Monarch Butterfly Biosphere Reserve

Monarch Mob: Monarch butterflies fill the sky at the El Rosario sanctuary in Michoacán, Mexico; an early return south this year suggests their numbers may be rebounding.

Grey Reef Sharks and Dark-Banded Fusiliers, French Polynesia Paul McKenzie / SuperStock

Amazing Free Wallpaper, Desktop Wallpaper and Free Screensavers! Now on Windows, Mac, Android and iOS.

spinner shark migration off coast of Florida

Instagram Post by National Geographic (@natgeo)

Bowhead whales

Stunning drone footage reveals bowhead whales like their afternoon siestas

Bowhead whales like their afternoon siestas.

The rarely seen heat run is a mating ritual, and this one involves a pod of 15 male humpback whales chasing one female lead

Stunning footage of humpback whales shows 'heat run'

The rarely seen heat run is a mating ritual, and this one involves a pod of 15 male humpback whales chasing one female lead

Despite humpback whales being spotted in larger pods when mating, they often prefer to travel in much smaller groups in their day-to-day lives

Stunning footage of humpback whales shows 'heat run'

Despite humpback whales being spotted in larger pods when mating, they often prefer to travel in much smaller groups in their day-to-day lives

Deniz Aslanları (Palomino Adası, San Juan, Porto Riko)

35 Photos Of Incredibly Large Packs of Animals Remind Us That Our Planet Is Shared

Whale Shark - Conception Island, Seychelles by Joe Daniels #Whale_Shark

Oh Whale Shark--Why do you elude me so? Whale Shark - Conception Island, Seychelles by Joe Daniels

Whale swimming under another whale in Wilhelmina Bay

Life as a whale: a humpback's view of the Antarctic – in pictures

Whale swimming under another whale in Wilhelmina Bay

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