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Commissary Ridge Fall 2023

Season Summary

Species Count
Total Count

Species Composition

Species composition changes over time depending on weather, seasons, and many other factors. This chart displays the composition over a time period you select.

Click on pie pieces to see more detail. If there are more than seven species, click on "Other" to see a breakdown of the rest.


Many sites have a protocol that is designed to maximize finding particular species. If you select "Focus Species," only these species will be shown.

Date Selector

The control box below the pie chart lets you select a date period for the chart.

You can push the buttons "1d," "1w," or "1m" to zoom the graph to 1 day, 1 week, or 1 month.

The graph shows the overall volume seen on each day. You can drag the sliders on each side of this graph to adjust the start and end dates.

Species Composition
August 15th to December 31st

Drag the Sliders Below to Change the Dates Shown

Hourly Data

The time shown in the top row is the start of the one hour period.

Select Day

Choose a date to load the hourly table for that day. Only days that have data are shown.

Daily Counts

These charts show which species are most numerous at different parts of the season. Hover your mouse over a chart to see the number for a given day. The right column shows season totals and the left side shows the maximum for a single day. Each graph is scaled so that the single-day maximum is the highest point on the chart.

Sort By
  • Focus Species: Show the highest priority species at the top of the list.
  • Taxonomic Order: Sort the species by their scientific classification.
  • Alphabetic Order: Sort the species by their common name.
  • Abundance: Sort the species with the largest number counted at the top.

Daily Counts

Turkey Vulture
Golden Eagle
Northern Harrier
Sharp-shinned Hawk
Cooper's Hawk
American Goshawk
Accipiter sp.
Show More Species

Site Weather

Commissary Ridge Fall 2023

Commissary Ridge has high overall volume and diversity of raptors and is both accessible and logistically well-suited to be a long-term migration monitoring site. HWI conducted the first full-season count in 2002 at Commissary Ridge and has continued full-season counts each year since.


From Evanston, WY, head east on I-80 for 13 miles. Take U.S. 189 north to Kemmerer and continue 1 mile north of Kemmerer to Frontier, then turn northwest on State Rd 233. Continue for about 16 miles to Lake Viva Naughton/Viva Naughton Reservoir (before reaching Lake Viva Naughton, you will pass another smaller reservoir). At the southeast tip of the Lake Viva Naughton, turn right on a 2-track dirt road (unmarked BLM road, look for a small sign on the fence about 30 feet from the main road). Continue down dirt road to the ridge, about 6 miles. Camp will be on your left. Walk up the ridge to the observation area.

HawkWatch International

The mission of HawkWatch International is to conserve our environment through education, long-term monitoring, and scientific research on raptors as indicators of ecosystem health.

About the Data

All data displayed on this site are preliminary and have not yet undergone quality control. Written permission is required to use the data.