Data are updated on a daily basis during the seasons of active submissions (spring and fall migration) and backed up every 24 hours. Updating frequency exceeds daily at height of field seasons.
Plans are underway to incorporate the data into the Avian Knowledge Network. See <http://www.avianknowledge.net/>
Funding comes from a matching grant of the National Fish and Wildlife Foundation with counterpart funding from partner organizations.
Data are collected and entered into HawkCount.org by independent sites their submissions are labeled by contributor.
This protocol includes tables for (a) Weather and observation codes; (b) Species names, sex, and color morphs; (c) Tables for wind speed, precipitation, height of flight, etc., as well as a form for seasonal metadata. The metadata is generally overlooked and poorly documented and addresses questions such as: How many people participated during the season? What are their qualifications? Which species are monitored? Which units (e.g. Metric, English) are used in the weather data recordings? What optical equipment is used? Is there a training scheme in place before starting the field season? Is the site staffed by professional biologists or volunteer citizen scientists? These are all questions that can help to interpret the data at later stages.
In summary, the procedure consists of standardizing the count day/season of each monitoring site. For each species, the model (1) Identifies the daily window during which 95% of the migrants are counted; (2) Selects the seasonal passage window when the middle 95% of the individuals were counted across all years; (3) Models curvilinear effects of wind speed and direction on number of hawks counted; (4) Calculates indices of passage rate [date-adjusted estimated geometric means]; (5) Obtains trends in annual passage rates by fitting a polynomial regression model to the time series of annual indices; and (6) Re-parameterizes the year terms to determine the significance of these trend estimates (Farmer et al. 2007 [in press]).
Site profile data include: name of site; location; coordinates; link to website; general site information; site contacts; raptor species observed at site; count season; procedures/protocols; data inventory; site history; site topography; and directions to site.
Plans are underway to incorporate the data into the Avian Knowledge Network. See <http://www.avianknowledge.net/>