Sleepy Animals at the Pittsburgh Zoo

Recently, http://www.montegraphia.com, his sis, and I went on an African/Asian/American/Antarctican safari at the Pittsburgh Zoo. The first amazing cite was the emptiness; it was a weekday during the beginning of a new school year, which means, there were retirees, pregnant woman, and NO school groups.

Though we saw many animals awake, alert, playing, eating, and showing off, there were equivocal amounts of each species engaging in my favorite pastime: sleeping. Each species of invert/vertebrates adopts a stereotypic, species-specific sleeping posture, which coincidentally is also one of the four behavioral criteria of sleep.

Flamingos awkwardly nestle their necks into their plumage; They exhibit unihempispheric slow wave sleep in which one half of the brain is awake, while the other half sleeps. This is a physiological adaptation in bird and aquatic species, enabling birds to remain vigilant of predators at all times and/or to prevent drowning.

Yes, even river otters can sleep in the water

They awkwardly nestle necks into feathers. Like most bird species, flamingos have unihemispheric sleep; one half of the brain is asleep, and the other half is awake. This is a physiological adaptation, enabling birds to remain vigilant of predators at all times.

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