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Theba pisana snails aestivating on Foeniculum vulgare in Montbazin, France. Aestivation (Latin: aestas (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter.
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 ...
A snail farm near Eyragues, Provence, France. Heliciculture, commonly known as snail farming, is the process of raising edible land snails, primarily for human consumption or cosmetic use. [1] The meat and snail eggs a.k.a. white caviar can be consumed as escargot and as a type of caviar, respectively. [2]
Other fish do seem to sleep, especially when purely behavioral criteria are used to define sleep. For example, zebrafish , [ 7 ] tilapia , [ 8 ] tench , [ 9 ] brown bullhead , [ 10 ] and swell shark [ 11 ] become motionless and unresponsive at night (or by day, in the case of the swell shark); Spanish hogfish and blue-headed wrasse can even be ...
The desire for, or occurrence of, more sleep during winter may have to do with how light fluctuates throughout the year, or with the behavioral and mental health changes that can result.
While hibernation has long been studied in rodents (namely ground squirrels), no primate or tropical mammal was known to hibernate until the discovery of hibernation in the fat-tailed dwarf lemur of Madagascar, which hibernates in tree holes for seven months of the year. [17]
Snails were widely noted and used in divination. [31] The Greek poet Hesiod wrote that snails signified the time to harvest by climbing the stalks, while the Aztec moon god Tecciztecatl bore a snail shell on his back. This symbolised rebirth; the snail's penchant for appearing and disappearing was analogised with the moon.
Grey squirrels, or Eastern grey squirrels, primarily live in the Eastern half of the U.S. and southern Canada. There is also a healthy population in the U.K., where they were imported in the 19th ...