Wednesday, December 7, 2011
Tuesday, November 29, 2011
AestivationFrom Wikipedia, the free encyclopedia
TorporFrom Wikipedia, the free encyclopediarely upon torpor to survive.
|Look up torpor in Wiktionary, the free dictionary.|
DormancyFrom Wikipedia, the free encyclopedia
Wednesday, November 2, 2011
Sunday, October 30, 2011
Loreal pitThe Loreal pit is the deep depression, or fossa, in the loreal area on either side of the head in crotaline snakes (pitvipers). It is located behind the nostril and in front of the eye, but below the line that runs between the centers of each. It is the external opening to an extremely sensitive infrared detecting organ. The loreal pit is bordered by lacunal scales.
fossa /fos·sa/ (fos´ah) pl. fos´sae [L.] a trench or channel; in anatomy, a hollow or depressed area.
Rattlesnakes and other pit vipers have remarkable heat-sensing pits. Located behind each nostril, below a straight line that would directly connect the nostril to the eye, is a loreal pit (called this because it is a depression in the loreal scale). These pits are highly effective in detecting differences in temperature even several yards away. At short ranges within a foot or so, minute differences (of perhaps fractions of a degree) may be perceived.
Heat given off by an animal creates a heat image; therefore, rattlesnakes have “heat vision.” The heat images are integrated with visual ones in the brain. This type of vision is helpful for nocturnal predators, for it enables them to hunt effectively even in total darkness. It may also help distinguish predator from prey, allowing rattlesnakes to determine whether they are at risk themselves. Larger, non-prey animals give off larger heat images, signaling the snakes to avoid potential encounters with these animals.
This is from www.desertmuseum.org
Thursday, October 20, 2011
Friday, October 14, 2011
- The California King snake is a constrictor and kills and eats rodents, reptiles, and birds by constricting and crushing the life out of its food.
- It is one of the most popular of the Southwestern snakes to keep as a pet and also to breed.
- This time of the year reptiles and mammals are especially vulnerable on the roads in the desert because it is finally cool enough to hunt and move about during the day when there is more traffic.
- I collected the snake carcass because I wanted to photograph it and also preserve the snakeskin.