By Scott A. Rowan (from Flocked.co)
How are penguins and dogs alike?
Penguins are so good at staying warm that they have to use many methods to cool down. Yes, even though they live on and in the waters around Antarctica, penguins often overheat.
Much like dogs, who are not able to sweat and pant to ease overheating, penguins pant to release warm air. That is only one method penguins use to cool off. Taking a swim in the cold water obviously helps, but there are many times – like during molting and breeding seasons – when going for a swim isn’t possible.
During those periods of time, penguins will pant to release heat as well as ruffle their feathers to release the warm air trapped in their feathers. They will also raise their flippers, exposing more of them to the air. Their flippers have capillaries close to the surface, allowing heat to quickly release. In fact, the flippers will often turn shades of pink from the amount of heat being released.
Penguins that live in warmer areas, such as Galapagos Penguins (Spheniscus mendiculus), have less body fat and their down isn’t as thick as their cousins who live on ice, so they have special body parts. Tropical penguins have bare patches in their feathers that expose their flesh to quickly release heat. These heat-release areas are located around their eyes, beak, under the flippers, and soles of their feet. To release heat the quickest, some penguins will lay on their belly to expose the soles of their feet to increase the amount of bare flesh exposed to the air.
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