Migration Count 2019
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.
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.
August 15th to November 30th
The time shown in the top row is the start of the one hour period.
Choose a date to load the hourly table for that day. Only days that have data are shown.
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.
- 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.
Migration Count 2019
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.
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.