In this data base all by us known sightings of rare birds are listed. This includes all species with less than one hundred birds found in the Azores. All sightings are included, even some rejected by the Portuguese Rarity Committee (CPR). Species with 1-99 sightings (birds) are all numbered in chronological order. For species with over 100 sightings go to the Scarce and common bird database.
   For the same list but complete with information about references, documentation status, and more details - please go to the Rare bird reference database.

   We have tried to give one number for each bird which means that a bird in the same place in two different days often is presumed to be one and the same bird. In some cases (mostly larger birds) we have given a bird the same number even if the observations are made on different islands (if dates, plumage, and presumed migratory/flight direction fits). This is to avoid any double counts.
   For a number of records (especially older ones) the exact dates may be missing. Dates are then given with zeros in decades, years, or months. More information about this is often given in the full reference version (No date = 1900-00-00, before 1903 = 1902-00-00, February 1968 = 1968-02-00) et cetera.
   The data base is updated continuously but there can be some disorder concerning record numbers for recent observations. This is due to the fact that recent observations have to be checked manually if the bird might be a previous recorded individual.