Hawk Mountain Spring 2017
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.
April 1st to May 15th
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.
Hawk Mountain Spring 2017
Hawk Mountain Sanctuary is one of the best places to see migrating raptors in North America, with an average of 20,000 hawks, eagles and falcons passing the lookouts each fall. The Sanctuary's bird counts constitute the world's longest record of raptor populations.
1700 Hawk Mountain Rd Kempton, PA 19529
Hawk Mountain Sanctuary
Located on the Kittatinny Ridge of Central Appalachian Mountains in eastern Pennsylvania, Hawk Mountain Sanctuary's landscape is second-growth mixed deciduous forest, including oak-maple forest on the mountains and rolling, partly wooded, farmland and Christmas-tree plantations in the valleys. The Appalachian Trail abuts Hawk Mountain Sanctuary on the eastern border and state gamelands border sanctuary forest to create 15,000 acres of protected lands. Visitor facilities include a visitor center with a raptor exhibits and bookstore with free programming on weekends during spring and fall. The Sanctuary, which is open year-round, attracts more than 80,000 visitors annually, with as many as 3,000 visitors on some weekend days in October. The Sanctuary has 10 lookouts and 15 km of trails. An admission fee is charged for access to the trails and lookouts. The Sanctuary's long-term count site, the North Lookout, is a 465-m rocky outcrop with a 240° view to the northeast, 1.5 km from the Visitor Center parking lot. Raptors slope-soar along the Kittatinny Ridge and thermal-soar over adjacent valleys at the site. Migration is most pronounced on northwest winds, especially on the first two days following the passage of a cold front.
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. Send data inquiries to Laurie Goodrich, firstname.lastname@example.org.
Help support raptor conservation with a membership or charitable gift to Hawk Mountain Sanctuary.
The raptor count is sponsored by Swarowski Optics.