The segment counts by social group and species or species group for the Waterfowl Breeding Population and Habitat Survey and associated segment effort information. Three data files are included with their associated metadata (html and xml formats).

Segment counts are summed counts of waterfowl per segment and are separated into two files, described below, along with the effort table needed to analyze recent segment count information.

1. wbphs_segment_counts_1955to1999_forDistribution.csv, which represents the period prior the collection of geolocated data. There is no associated effort file for these counts and segments with zero birds are included in the segment counts table, so effort can be inferred; there is no information to determine the proportion of each segment surveyed for this period and it must be presumed they were surveyed completely. Number of rows in table = 1,988,290.

2. wbphs_segment_counts_forDistribution.csv, which contains positive segment records only, by species or species group beginning with 2000. wbphs_segment_effort_forDistribution.csv file is important for this segment counts file and can be used to infer zero value segments, by species or species group. Number of rows in table = 365,863.

3. wbphs_segment_effort_forDistribution.csv. The segment survey effort and location from the Waterfowl Breeding Population and Habitat Survey beginning with 2000. If a segment was not flown, it is absent from the table for the corresponding year. Number of rows in table = 65,122.

Also included here is a small R code file, createSingleSegmentCountTable.R, which can be run to format the 2000+ data to match the 1955-1999 format and combine the data over the two time periods.

Please consult the metadata for an explanation of the fields and other information to understand the limitations of the data.