eBird is migrating their database. This means eBird will be unavailable starting 8am ET on 17 November until 8am ET on 19 November. Other affected services include: eBird APIs, Birds of the World, Bird Academy, Merlin Bird ID, and the Macaulay Library. You will also not be able to access any programs that require logging in with your Cornell Lab account during the outage.
You can still keep checklists using the app, then submit them once eBird is back online.