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A cow/calf winter herd is a herd that consists only of female elk and their young. In a normal winter, defined as one where there is a decent amount of snow fall, one study found that when the groups of cows and calves were safe from predation by wolves, about 75.6-83.0% of their diet was made up of graze whereas when wolves were present this number dropped to 61.6-69.4%. [3]
As the group moves, the predator has greater difficulty targeting an individual prey animal. The zebra has been suggested by the zoologist Martin Stevens and his colleagues as an example of this. When stationary, a single zebra stands out because of its large size. To reduce the risk of attack, zebras often travel in herds.
The Miniature Air-Launched Decoy (MALD) program was begun in 1995 by DARPA in an effort to develop a small, low-cost decoy missile for use in the Suppression of Enemy Air Defenses. Teledyne Ryan (acquired by Northrop Grumman in 1999) was granted a development contract for the ADM-160A in 1996, and the first test flight took place in 1999.
The M40A3, a bolt-action sniper rifle used by the United States Marine Corps.Introduced in 1966, the M40 was built up from a Remington 700 bolt-action rifle.. The major components of sniper equipment are the precision sniper rifle, various optical scopes and field glasses, specialized ammunition and camouflage materials for the sniper’s body and equipment.
This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.
Elk do not appear to benefit from thermal cover. [44] The Greater Yellowstone Ecosystem elk herds comprise as many as 40,000 individuals. [ 45 ] During the spring and fall, they take part in the longest elk migration in the continental U.S., traveling as much as 168 mi (270 km) between summer and winter ranges.
Pursuit predation becomes a better strategy than ambush predation when the predator is faster than the prey. [2] Ambush predators use many intermediate strategies. For example, when a pursuit predator is faster than its prey over a short distance, but not in a long chase, then either stalking or ambush becomes necessary as part of the strategy. [2]
As "decoy" came more commonly to signify a person or a device than a pond with a cage-trap, the latter acquired the retronym decoy pool. [3] The other form, a duck decoy (model), otherwise known as a 'decoy duck', 'hunting decoy' or 'wildfowl decoy', is a life-size model of the creature. The hunter places a number about the hunting area as they ...
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