who were the explorers of the river mentioned earlier?
Francisco de Ulloa
Colorado River
During the 16th century, the Spanish began to explore and colonize western North America. An early motive was the search for the Seven Cities of Gold, or "Cibola", rumored to have been built by Native Americans somewhere in the desert Southwest. According to a United States Geological Survey publication, it is likely that Francisco de Ulloa was the first European to see the Colorado River when in 1536 he sailed to the head of the Gulf of California. 
where is the colorado river located on the map Southwestern United States and northern Mexico what are its tributaries? Gila River, Gunnison river, San Juan river, Green river, etc. who were the early settlers here? Spanish what kind of plants are found here? Creosote bush, saguaro cactus, and Joshua trees, etc. how has the environment been effected? Reduction in flow caused by dams, diversions, water for thermoelectric power stations, and evaporation losses from reservoirs – the latter of which consumes more than 15 percent of the river's natural runoff—has had severe ecological consequences in the Colorado River Delta and the Gulf of California. are there any parks at the former location of the river mentioned earlier? Yes, the southwestern United States contains many well-known national parks including Grand Canyon , Death Valley,  Great Sand Dunes ,  Arches, etc. when did the europeans arrived? 1539 what are some of the animals found here? Bobcat, coyote, black bear, black-tailed jackrabbit, desert cottontail, desert bighorn sheep, mule deer, white-tailed deer, gray fox, mountain lion, river otter, long-tailed weasel, western spotted skunk, pronghorn, raccoon, and many more what is the diet of the first animal? Rodents,  birds, fish including small sharks, and insects what is its other name? Red lynx what is its significance in human culture? There are many significance one such is European colonizers to the Americas also admired the cat, both for its ferocity and its grace, and in the United States, it "rests prominently in the anthology of national folklore." are any conserving measures taken for these animals? Yes,  Convention on International Trade in Endangered Species of Wild Fauna and Flora
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Colorado River [SEP] Early explorers
Kino's 1701 map, "Paso por Tierra a la California," is the first known map to label the river as the Colorado. During the 18th and early 19th centuries, many Americans and Spanish believed in the existence of the Buenaventura River, purported to run from the Rocky Mountains in Utah or Colorado to the Pacific Ocean. The name "Buenaventura" was given to the Green River by Silvestre Vélez de Escalante as early as 1776, but Escalante did not know that the Green drained to the Colorado. Many later maps showed the headwaters of the Green and Colorado rivers connecting with the Sevier River (Rio San Ysabel) and Utah Lake (Lake Timpanogos) before flowing west through the Sierra Nevada into California.