This page lets you enter a number of eBird checklists and see a combined total, by species, for all checklists.
To add a checklist, enter the submission ID or checklist URL (e.g. http://ebird.org/ebird/view/checklist?subID=S12345678), then click the "Add Checklist" button
or press the "Enter" key.
You can enter multiple checklists at once, separated by commas.
To export the combined totals, click the "Export Aggregate Counts" button.
To remove a checklist from the list, click the "Trash can" button on the right side of the table row. This operation will *not* remove the checklist from eBird.
To remove all checklists from the list, click the "Remove All Checklists" button. This operation will *not* remove the checklists from eBird.
Updates
20181117: The page now retains your checkists when you refresh the window or open a new tab.