The annual Raptor (aka Birds of Prey — eagles, hawks, falcons, owls and vultures) migration is in full swing. The birds of prey are migrating north to their summer nesting grounds. The raptors fly up the hog back for several reasons. First, it is an easy marker for them to follow — a constant ribbon of rock from New Mexico into Wyoming. Second, the sun warms the rocks and provides up drafts. These up drafts give a little extra lift that the heavy birds of prey use to gain altitude. With the gift of lift, the raptors can soar for more miles every day.
Scientists take advantage of the concentration of raptors. There is a monitoring station perched on top of the Dakota Hogback at Raptor Ridge, just on the east side of Co Hwy 93, just south of the I-70/ Co Hwy 93 interchange. There is a parking lot at the base of the hog back, across from Mathews-Winters Open Space. http://jeffco.us/open-space/parks/matthews-winters-park/
Scientists from the Denver Museum of Nature and Science initially manned the observation station, but budget cuts took their toll, and the job was passed on to Hawk Watch volunteers from the Rocky Mountain Bird Observatory. http://rmbo.org/v2/web/getInvolved/hawkWatch.aspx These hardy folks volunteer to count the raptors as they fly overhead. Not a bad gig when it is nice out, but in wind or cold, it takes true dedication.
But their work pays off, and you can see it in their reports. Since they started watching at the beginning of April, almost 400 birds of prey have been spotted cruising over the hogback. https://groups.google.com/forum/?fromgroups#!topic/cobirds/N7YwWW90D3k
Hawk Watch will continue counting raptors through May. Go up and see them and spot some hawks flying by.