This trip is brought to you by Boulder County Audubon. Please note that a
reservation is necessary. There are 5 spots left.
*Wintering Raptors: Species, Sub-Species and Conservation Biology*
*Leader: Sue Cass*
*Date: Sunday, January 29, 2017; snow date Saturday, February 4, 2017*
*Time: 8:00 a.m.-12:00 p.m.*
*Free: Limit:* 15 in no more than four cars.
*Reservations: * <suecass...>
Sue is well known as a Volunteer Naturalist for Boulder County and as one
of the best trainers for the multi-year County Winter Raptor Surveys.
Please join her for this field trip where the goals are much more than
simple identification to species. You will attempt to take all of the
Red-tail Hawks down to subspecies by observing definitive plumage
variations of Boulder County’s resident Western Race Red-tails, *Buteo
jamaicensis calurus*. Other possible sightings include Ferruginous,
Rough-Legged and Harlan’s Hawks, Bald and Golden Eagles, Northern Harrier,
American Kestrel and Prairie Falcon as well as the Great Horned Owl.
There will be a discussion of the relevant aspects of raptor ecology, which
may include migration patterns, reproductive strategies, Reverse Sexual
Dimorphism (RSD), polymorphism, intergradation (subspecific interbreeding
and the resultant plumage variations) and conservation.
Meet promptly at 8 a.m. at the parking lot of Lagerman Reservoir, on the
south side of Pike Road between 63rd and 75th Street. Wear warm clothing
and bring water/snacks, binoculars, spotting scopes, raptor field
guides/apps and a sharp eye!