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Detroit River Hawk Watch Fall 2019

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 1st to November 30th

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

Black Vulture
58
Turkey Vulture
51816
Osprey
24
Golden Eagle
62
Northern Harrier
268
Sharp-shinned Hawk
3648
Cooper's Hawk
119
Northern Goshawk
3
Show More Species

Detroit River Hawk Watch Fall 2019

The Detroit River Hawk Watch (a joint venture of the Detroit River International Wildlife Refuge and its Friends group, the International Wildlife Refuge Alliance) is the Boat Launch at Lake Erie Metropark located approximately 32 km south of Detroit, Michigan. The location is at the mouth of the Detroit River as it enters Lake Erie. During the autumn months, the lower Detroit River becomes a corridor for the passage of migratory birds, and has gained international recognition for the annual volume of birds of prey. Hundreds of thousands of migrating hawks, eagles, falcons, and vultures are concentrated at this location where it is possible to systematically count them each year.

Directions

Lake Erie Metropark: From I-75, exit at Huron River Drive (exit 27). Continue east on Huron River Drive. Turn left on West Jefferson and proceed a few hundred yards to the entrance of Lake Erie Metropark. After paying the entrance fee, follow the signs to the Boat Launch.

Detroit River Hawk Watch

A unique gem located in southeast Michigan in the heart of a metropolitan area, Detroit River IWR is the only international wildlife refuge in North America. The organization manages the Detroit River Hawk Watch at Lake Erie Metropark.

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.