Lepidoptera of North America
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Browsing Lepidoptera of North America by Subject "Butterflies -- Colorado -- Boulder County"
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Item Open Access Lepidoptera of North America 17. 2019 butterfly inventories within Boulder County open spaces, Boulder, Colorado(Colorado State University. Libraries, 2020-03) Chu, Janet, author; C.P. Gillette Museum of Arthropod Diversity, publisherButterfly Inventories took place for the 16th consecutive year within Boulder County Open Space properties. Over the years 2004-2019, 129 butterfly species have been sighted in eight of the Open Spaces; 76 were counted in this year alone. More photographers than ever before on the team this season captured nearly 93 of the known 202 butterflies in Boulder County. These Butterfly Research Volunteers helped collect data during 340 field hours. Venice Kelly studying on Sherwood Road and in the main Caribou Ranch contributed at least 53 hours on site. Other volunteers did not complete the past transects due to several reasons: trail being moved in the mid-season to a newer, grassier area from Geer Watershed, Heil Valley Ranch; unsafe high-speed bicycle interactions on the Loop Trail, Walker Ranch; personal reasons on Anne U. White Trail. Late wet, cold spring weather slowed butterfly emergences, resulting in some normally typically spring species flying with the early summer species. Certain summer species flew later into the early fall. August and September were mostly hot and dry allowing the continued flight by many brush-foot (Nymphalidae) butterflies.Item Open Access Lepidoptera of North America 18. 2021 butterfly inventories within Boulder County open spaces, Boulder, Colorado(Colorado State University. Libraries, 2022-04-04) Chu, Janet, author; Hirschfeld, Sue, author; Kelly, Venice, author; C.P. Gillette Museum of Arthropod Diversity, publisherThe butterfly inventories continued for the 18th year in a few of the Boulder County Open Space properties. However, because of the Calwood Fire during October 17, 2020, two of the survey areas were inaccessible; Plumely Canyon and the work road through the streamlet near the Lichen Trail. Geer Watershed had been burned, but the meadows above the Resident Ranger's Cabin and associated streamlets were made accessible with our 2021 permit. Cabbage Whites (Pieris rapae), Orange Sulphurs (Colias eurytheme) and Common Wood-nymphs (Cercyonis pegala) were more numerous when compared to 2015-2020 populations before the burn. In 2021 within other Open Spaces, Anne U. White and Caribou, the resident species produced noticeably large populations: Julia Orangetips (Anthocharis julia), Pine Whites (Neophasia menapia), Northern Checkerspots (Chlosyne palla), Common Wood-nymphs, Small Wood-nymphs (C. oetus), Common Checkered-skippers (Burnsius communis). On the other hand, the well adapted non- native Cabbage Whites were again the most common during the long season; Variegated Fritillaries (Euptoieta claudia) and Dainty Sulphurs (Nathalis iole) were numerous flying in from colonies in the eastern plains and low foothills where their host plants were plentiful. 95 species were seen in 2021: 129 species between 2004 and 2021 in the county Open Spaces. 203 species are on the record for Boulder County (Butterflies and Moths of America 2021) website. The average number of species per year observed within the Open Spaces by this team is 88.