Learn More

BDMC Spring 2023

Day Summary

Species Count
Total Count

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

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.


Find the locations of sightings on the map.

Click on the markers to display the sightings in the box below the map. As you zoom in closer, the clusters will break into more detailed points.

Click "Reset Map" if you would like to display all the sightings and have the map automatically update as new sightings come in.

Select the time period buttons to only show sightings from that long ago.

Drag the map to pan and use the + and - to control the zoom.

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
February 14th to March 24th

Drag the Sliders Below to Change the Dates 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

warbler sp. (Parulidae sp.)
passerine sp.
Orange-crowned Warbler
Western Kingbird
Lawrence's Goldfinch
Yellow-rumped Warbler
Lesser Goldfinch
House Finch
Show More Species

Site Weather

BDMC Spring 2023

Migration Monitoring at Bear Divide

Bear Divide Migration Count

Moore Laboratory of Zoology at Occidental College

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.

Bear Divide Migration Count

Pasadena Audubon Society | Woodstar Biological | LA Birders