Abundance Codes

Abundance Code represents the number of estimated breeding pairs in a surveyed block:
  1. 1 breeding pair
  2. 2-10 breeding pairs
  3. 11-100 breeding pairs
  4. 101-1000 breeding pairs
  5. more than 1000 pairs

Abundance was desirable (although optional) for atlasers to record. In order for atlasers to estimate total number of breeding pairs in a given block, they were to determine how much suitable breeding habitat was in the block for a given species and extrapolate from the number of breeding pairs in the surveyed portions of the block.

Abundance code was not necessary for observations with a breeding code of just Observed (O).

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