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Description
I made this image of two male narwhal as a travel poster for Greenland.

Whales with spears. Two male narwhal "tusking," crossing their tusks, with sea ice and the mainland of Greenland in the background. Text reading "Greenland" and "Kalaallit Nunaat" (Greenland in Greenlandic) also appears.

The purpose of tusking, a common activity during warmer parts of the year, is unknown. It may be a friendly greeting or a way to remove lice that typically infest the base of the tusk.

Even the ultimate purpose of the spiraled tusk is not known for sure. It may serve the same purpose as deer and moose antlers, the peacock's tail feathers, or a lion's mane - to attract a mate. Some researchers believe it may serve as a sensory organ. Perhaps it serves more than one purpose.

Description
I made this image of two male narwhal as a travel poster for Greenland.

Whales with spears. Two male narwhal "tusking," crossing their tusks, with sea ice and the mainland of Greenland in the background. Text reading "Greenland" and "Kalaallit Nunaat" (Greenland in Greenlandic) also appears.

The purpose of tusking, a common activity during warmer parts of the year, is unknown. It may be a friendly greeting or a way to remove lice that typically infest the base of the tusk.

Even the ultimate purpose of the spiraled tusk is not known for sure. It may serve the same purpose as deer and moose antlers, the peacock's tail feathers, or a lion's mane - to attract a mate. Some researchers believe it may serve as a sensory organ. Perhaps it serves more than one purpose.