Rattlesnakes


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Rattlesnakes

 

(Crotalidae). rattlers, a family of poisonous snakes closely related to the vipers. The nerve endings at the bottom of the facial depression, located between the nostrils and the eye. are capable of perceiving even the faintest (approximately 0.1°C) variations in air temperature. As a result of this, the snake feels the approach of even a small warm-blooded animal, which is its prey. In daytime it hides under rocks and in the burrows of rodents. The snakes often gather in large numbers for hibernation.

Many rattlesnakes live in tropical forests; some are found in semideserts and deserts, while certain species live high in the mountains. Rattlesnakes feed on various vertebrates, chiefly mammals. The overwhelming majority of rattlesnakes are ovoviviparous (the young rupture the egg membranes a few minutes after they are laid). Two North American genera (Crotalus and Sistrurus) have a rattle on the end of the tail (from which the Russian as well as the English name of the family is derived). The rattle is formed of modified terminal scales and consists of movable segments. During rapid oscillations of the tip of the tail, the segments striking one another produce their peculiar sound.

The rattlesnake family includes six genera, which include more than 120 species. They are distributed in Asia and in North and South America. They are known from the Pliocene epoch. In the USSR they are represented by several species of mamushi. The bites of rattlesnakes are fatal to small animals and extremely dangerous to large animals and humans.

REFERENCE

Klauber. L. M. Rattlesnakes, vols. 1–2. Berkeley-Los Angeles. 1956.
References in periodicals archive ?
Rattlesnakes get rid of rats and other small rodents by immobilizing them with toxins.
Kelso put on a pair of protective gloves and guided the rattlesnake into a box.
These modern rattlesnakes produce smaller sets of toxins that might be more specialized to their prey.
Rattlesnakes are sit-and-wait predators that remain coiled at a hunting site, waiting to attack unsuspecting prey that wanders by (Secor and Nagy, 1994; Cundall and Greene, 2000; Clark et al.
I think the post speaks for itself but, what he said was he would rather invite a rattlesnake into his home than an ISIS jihadist terrorist.
Like many northern latitude squamate reptiles, rattlesnakes gather (sometimes in large numbers) and overwinter communally in subsurface rock shelters (hibemacula) to escape potentially lethal winter temperatures (St.
Rattlesnakes tend to be most toxic when very young, agitated, angry, or targeting prey.
Next year will mark 30 years since the 1984 debut of Lloyd Cole and The Commotions' classic album Rattlesnakes - he's ' classic album Rattlesnakes - he's still in touch with the band, he said, but there are no plans to reunite to mark the anniversary.
3 meters a year over the past 320,000 years and that their tolerances to climate have evolved about 100 to 1,000 times slower, indicating that range shifts are the only way that rattlesnakes have coped with climate change in the recent past.
Measuring from 3-4 feet or more in length, timber rattlesnakes are the largest venomous snakes in New York, and appear quite stocky.
It has been demonstrated that rattlesnakes can discriminate between envenomed and nonenvenomed rodents based on venom-related cues, a behavior that is crucial to the snake's ability to choose the chemical trail left by an envenomed rodent fleeing the strike area (Chiszar, Walters, Urbaniak, Smith, & Mackessy, 1999; Duvall, Scudder, & Chiszar, 1980).
Mr Teeter said he was unaware a licence was needed to hunt rattlesnakes in Idaho and did not know that there is a state limit of four rattlesnakes a year.