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HRBO Migration Count Fall 2017

Season Summary

Species Count
200
Total Count
242,274

Live Updates

The sightings you see here are being collected on a tablet by a biologist out in the field.

Hover your mouse over the points on the graph to see more details. Click on different species in the legend to show or hide them on the chart.

If there's nothing showing, it may mean that this site doesn't have access to the internet or isn't counting right now.

Live Updates

No Reports in the Last Two Hours

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.

Display

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
September 3rd to November 24th

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
1794
Osprey
252
Golden Eagle
191
Northern Harrier
563
Sharp-shinned Hawk
21878
Cooper's Hawk
175
Northern Goshawk
317
Accipiter sp.
1
Show More Species

HRBO Migration Count Fall 2017

The count at Hawk Ridge is one of the two or three highest on the continent north of Mexico. From 1991 to 2013 the average yearly number of raptors observed at Hawk Ridge is 76,000 and comprised of 16 regular hawk species and 4 rare hawk species plus 3 rare diurnal migrating owl species.

Directions

Counts are made from the ridge top Main Overlook on Skyline Parkway 1.7 km from the lake which is accessible by car.

Hawk Ridge Bird Observatory

The mission of the Hawk Ridge Bird Observatory is to protect birds of prey and other migratory birds in the Western Lake Superior Region through research, education, and stewardship.

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.