Thermal printer

A thermal printer (or direct thermal printer) produces a printed image by selectively heating covered thermochromic paper, or thermal paper as it is normally known, when the paper passes in excess of the thermal print head. The coating turns black in the areas where it is heated, producing an image. Two-color direct thermal printers are able of printing both black and an additional color (often red), by applying heat at two dissimilar temperatures. Thermal transfer printing is a connected method that uses a heat-sensitive ribbon instead of heat-sensitive paper.

Arizona Desert Bighorn Sheep

Desert bighorns show considerable differentiation between the sexes. Adult males weigh between 160 and 200 lbs. with a maximum weight of 225 lbs. Adult females range from 75 to 130 lbs. and average 110 lbs. The biggest visual difference between the two sexes is the horns. Ewe horns are generally 10 to 13 inches long with a circumference of 5 to 6 inches. Ram horns may measure 30 to 40 inches along the outside curl with a basal circumference of 13 to 15 inches. The horn core is honeycombed with chambers, or sinuses, which reduce the weight of the skull.

Newborn bighorn lambs weigh 8 to 10 lbs. The young are active within minutes after birth. The young have dark eyes and fuzzy, dark-grey hair. As they mature, their eyes take on the characteristic golden or amber color. After several months, they take on adult coloration; dark brown in their northern range and pale buff in the southern. Color accents are a white muzzle, rump patch, eye rings, and edging on the rear legs, with a black tail. Bighorn sheep have a life expectancy of 10 to 12 years, but can reach 17 or older.

Usually one, rarely two lambs will be born. Young rams stay with their mothers until two years of age. They then leave the nursery herds and join in the bachelor herds. Except during the breeding season, and sometimes during the spring when early vegetation sprouts, bighorn adults separate according to sex.