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Publications and Research
Ecosystem Symposiums Ecosystem Symposium 2009: Fractured Landscapes Ecosystem Symposium 2008: The Beetles are Coming Ecosystem Symposium 2007: Change is Coming Ecosystem Symposium 2004: Human Connections with Natural Systems Ecosystem Symposium 2003: Saving our Native Grasslands Ecosystem Symposium 2002: Issues at the Urban-Nature Interface Ecosystem Symposium 2001 Boulder County Avian Species of Special Concern The Avian Species of Special Concern list attempts to red-flag those species in Boulder County that are of interest due to their rareness, probable decline, and habitat or locational restrictions. Hence, they are more vulnerable and less adaptable to change. It is based on a comparison of historic and current records, studies, and lists that are felt to represent the best available information. The list primarily focuses on breeding status. In addition, the list utilizes regional, state and local assessments. Butterflies in Boulder County, 2004-2007 BCNA funded the 2007 continuation of a research program to survey Boulder County butterflies and preparation of a 74-page report. The surveys in 2004-06 were funded by the Boulder County Parks and Open Space Small Grants Program. Beginning in 1982, the Indian Peaks Four Season Bird Counts originated in order to inventory the avifauna of western Boulder and northwestern Gilpin counties, in Colorado. They have now continued for over fifteen years. They have provided information about species presence and relative abundance. They are also beginning to show trends and composition changes occurring in the mountain landscape.
Since 1983 Boulder County Nature Association (BCNA) volunteers have counted wintering raptors along survey routes scattered throughout the plains of Boulder County, Colorado. We initiated the surveys during a time when intensified poisoning efforts by private landowners and government agencies appeared to threaten prairie dog populations in parts of Boulder County. Some of these poisonings were occurring in the Boulder Reservoir area, where Ferruginous Hawks, Red-Tailed Hawks, and Bald Eagles gathered each winter. We wanted to observe the effects of fluctuating prairie dog populations on these and other species. We also hoped to locate wintering raptor concentration areas, such as Bald Eagle roosts, Northern Harrier roosts and large prairie dog colonies, so that these areas could be protected. Bald Eagle © George Oetzel Beginning in 1950 with Allegra Collister, volunteers have banded birds in Lykins Gulch, north of Boulder, Colorado. In 1991, BCNA volunteers Virginia Dionigi, Joe Harrison, and Tony Esposito began a concerted effort to revive the banding effort. Over 10,000 birds have been banded. Over 180 species have been banded or sighted in this small gulch measuring a quarter mile long and 300 yards wide. Presented here are some of the preliminary data. The site has now been closed, so no further reports will be issued.
BCNA Ecosystem Plan: 20+ Years of its Evolution and Current Status This series of articles explores the evolution of the BCNA Ecosystem Plan and the current status of the core preserves and habitat connectors. As BCNA is nearing its 25-year anniversary, it seems appropriate to take a look at some of the long-term projects that have helped define the organization. Most of the articles have appeared in the BCNA newsletter, beginning with the summer 2006 issue. All are written by Dave Hallock.
Research Projects Sponsored by BCNA Each year BCNA sponsors a number of small research projects, typically performed by university researchers. Reports from some of those projects are listed here.
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