This refuge is an oasis for waterfowl during spring and autumn migrations. Founded in 1964, Pahranagat provides a refuge for great blue herons, egrets as well as warblers, orioles, and finches. Over 240 different species of bird have been sighted in the refuge and bird watching has become a favorite pastime of visitors. Pahranagat is made up of 5,380 acres of marshes, open water, and native grass meadows. Groves of cottonwood trees shade the shoreline.
Experts recognize 17–19 subspecies, which vary in appearance and range; there is disagreement over whether the distinctive Barbary Falcon is a subspecies or a distinct species. The Peregrine's breeding range includes land regions from the Arctic tundra to the Tropics. It can be found nearly everywhere on Earth, except extreme polar regions, very high mountains, and most tropical rainforests; the only major ice-free landmass from which it is entirely absent is New Zealand. This makes it the world's most widespread bird of prey. Both the English and scientific names of this species mean "wandering falcon", referring to the migratory habits of many northern populations. While its diet consists almost exclusively of medium-sized birds, the Peregrine will occasionally hunt small mammals, small reptiles or even insects. It reaches sexual maturity at one year, and mates for life. It nests in a scrape, normally on cliff edges or, in recent times, on tall human-made structures. The Peregrine Falcon became an endangered species in many areas due to the use of pesticides, especially DDT. Since the ban on DDT from the beginning of the 1970s onwards, the populations recovered, supported by large scale protection of nesting places and releases to the wild. (For attributions and a habitat map please see the wikipedia entry.)
Description: Perennial; flowers May to September; noxious weed in Nevada and Utah Origin: Eurasia Reproduction: Seeds and vegetative Known locations at Lake Mead NRA: Las Vegas Wash, Virgin River and Willow Beach Fish Hatchery Control: Herbicide, because of its extensive root system. Do not hand pull
Description: Annual; mat-forming; burs can puncture bicycle tires; flowers May to October; noxious weed in Nevada and Arizona Origin: Europe Reproduction: Seeds Known locations at Lake Mead NRA: Disturbed areas and developed areas Control: Mechanical (hand pull)