The recent round of updates for the Clements checklist, as published by Cornell, have now been incorporated in BUBO Listing. There were plenty of taxonomic updates, including 12 new species and no fewer than 74 different splits. Also major changes to family composition and sequencing.
Most world listers will find they can increase their list by applying these taxonomic updates! As usual you will be notified if any updates impact you, and you can view the updated Clements checklist in full.
UPDATE - we'd forgotten to split Water Rail and Brown-cheeked Rail, so you may get prompted again for another taxonomic check.