Standard breeding bird censuses with 100 m radius counting circles.  Observing periods divided into 0-3 min, 3-5 min, and 5-10 minutes for comparison with other censuses.  For 3-5 min period, only additional birds not recorded in the 0-3 period are recorded.  For 5-10 min period, only additional birds not recorded in the 0-5 min period are recorded.  Birds recorded either visually or by sound.  Counting circle boundaries set a minimum of 200 m from each other.  Observer distinguished between birds within 50 m of the center point, birds from 50-100 m, and those beyond 100 m.  Counts carried out from late May through August over a three-year period.  Placement of circles within vegetated salt marsh habitat.

NOTES AND COMMENTS:
Temperature inconsistently recorded
Variable description clarification-
Beaufort scale: whole numbers from 1-12 with increasing wind based on observations of trees, waves, etc. (http://en.wikipedia.org/wiki/Beaufort_scale)

AlphaCode- Four-letter codes, based on English names, broadly following the rules and strategies adopted by the U.S. Bird Banding Laboratory (BBL), http://www.birdpop.org/AlphaCodes.htm.