The Cape Cod Lake and Pond Waterfowl Survey
Since 1984, the Cape Cod Bird Club has conducted an annual survey of waterfowl on Cape Cod ponds and lakes. The survey takes place on the first weekend in December and covers well over 300 water bodies. The number of waterfowl recorded has varied greatly from a low of 6782 individuals in 2005 to a high of 13,637 in 1998, and the number of species has ranged from 22 to 31.
Beginning in 2016, the complete results are available online here
Annual summaries of the results (pdf files) from 1995 through 2014 are available below: