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  2. Yawn - Wikipedia

    en.wikipedia.org/wiki/Yawn

    A white tiger yawning A cougar yawning. Mammals, birds, and other vertebrates yawn. [62] In animals, yawning can serve as a warning signal. Charles Darwin's book, The Expression of the Emotions in Man and Animals, mentions that baboons yawn to threaten their enemies, possibly by displaying large canine teeth. [63]

  3. Crepuscular animal - Wikipedia

    en.wikipedia.org/wiki/Crepuscular_animal

    Apart from the relevance to predation, crepuscular activity in hot regions also may be the most effective way of avoiding heat stress while capitalizing on available light. Crepuscular flight activity is preferred by some animals, such as the walnut twig beetle, due to warmer temperatures, moderate wind speeds, and low barometric pressure. [7]

  4. Why you yawn when you’re bored, according to experts - AOL

    www.aol.com/lifestyle/why-yawn-bored-according...

    Yawning is also phylogenetically preserved, meaning it occurs in many different animal species including mammals, birds, reptiles, amphibians, and fish, Epstein adds. Why do I yawn when I’m bored?

  5. Nocturnal bottleneck - Wikipedia

    en.wikipedia.org/wiki/Nocturnal_bottleneck

    Unique type of brown adipose tissue, allowing mammals to generate heat quickly. [10] Mitochondria with respiration rates five to seven times higher than those of reptiles of similar size. [11] Fur to assist in thermo-regulation in a cold (night) environment. Lack of an ocular shielding mechanism against (diurnal) ultraviolet light. [12]

  6. Woman’s Evidence of Squirrel 'Hanging Around' Her Snow ...

    www.aol.com/lifestyle/woman-evidence-squirrel...

    Squirrels will also shiver to help them generate body heat – sounds pretty adorable to us. Some squirrels will stay in their den for longer periods of time during the winter. Several squirrels ...

  7. Why do we yawn — and why is it so contagious? Experts explain.

    www.aol.com/lifestyle/why-yawn-why-contagious...

    Science & Tech. Shopping. Sports

  8. Sleep in animals - Wikipedia

    en.wikipedia.org/wiki/Sleep_in_animals

    Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...

  9. Chionophile - Wikipedia

    en.wikipedia.org/wiki/Chionophile

    Japanese macaques can survive in cold temperatures of below −15°C (5°F), and are among very few primates that can do so. Chionophiles are any organisms ( animals , plants , fungi , etc.) that can thrive in cold winter conditions (the word is derived from the Greek word chion meaning " snow ", and -phile meaning "lover").

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