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• <br />-5- N104 Shallow Foothill MLRA 49 <br />5. ThrE~atened and Endangered Plants and Animals <br />Gain^a neomexicana coloradoensis or Colorado butterfly weed has been <br />reported as endangered in Boulder, J.buglas, Jefferson, Larimer, and <br />Weld counties. However, its occurrence on this range site has not <br />been proven. . <br />The buffalo (bison) are gone, except fora few commercial herds. <br />The black-footed ferret may have been associated with this site or <br />adj~icent sites. <br />6. Plants That May Cause Poisoning To Livestock <br />Common <br />Name <br />Scientific Name <br />Season <br />Dangerous <br />Spring and <br />early summer <br />when other. <br />green forage <br />is not <br />available <br />Animal s <br />Affected <br />Geyer larks~our <br />Nuttall LarJkspur <br />effect and symptoms <br />Delphinium geyeri <br />Delphinium nuttallianum <br />Cattle are <br />most sus- <br />ceptible; <br />horses and <br />sheep are <br />occasionall y <br />affected <br />Poisoning is cumulative. Symptoms include loss of appetite, general <br />uneasiness, excessive salivation, frequent swallowing, twitching muscles, <br />rapid irregular heart beat, respiratory paralysis, and staggering gait. In <br />advanced cases the animal fa1Zs and lies with feet extended more or less <br />rigidly. Poisoned animals are constipated and severe cases are nauseated <br />and some arse also bloated. <br />Season Animals <br />Common Scientific Name Dangerous Affected <br />Name <br />common chokecherry Prunus virginiana <br />spring sheep- <br />and early cattle <br />summer <br />when leaves <br />contain a <br />Large <br />amount of <br />tr~xin dur- <br />ing periods <br />of short <br />forage, <br />freezing <br />weather <br />1~ <br />~'~- <br />