Mangrove Landbird Survey Data

Results of 10-minute bird surveys conducted throughout the mangroves of southern Florida from 2008 - 2011 by John Lloyd and Gary Slater of Ecostudies Institute.  Surveys were conducted from April - June in each year, corresponding to the putative breeding season for most species in this assemblage.  Full metholodological details availble in Lloyd and Slater 2014.

Description of data file:

Point_ID: Unique number for each point. Note that in some cases a point surveyed in one year could not be revisited in subsequent years (e.g., because it became inaccessible) and so a new point, with a new number, was established as close as possible to the previous point. This happened primarily at Biscayne National Park.

Site_Nam: A descriptive name for the general location for each set of points. See Lloyd and Slater 2014 for methodology of setting points.

X_Coord: UTM easting (Zone 17N)

Y_Coord: UTM northing (Zone 17N)

UTM_Zone: Which UTM zone do the coordinates refer to? Note that this column was left blank as all points are within zone 17N.

Datum: Which geodetic datum?  Note that all data recorded in WGS84.

Sampling Period: Year and season in which survey occurred (all surveys are presumed breeding season).

Survey Date: Date of survey.

Start time: Time of day that survey began.

Observer initials: Initials of the observer.
Interval: Interval in which the detection occurred. Intervals are 1-minute long. Each survey is 10 minutes in length and made up of 10 intervals.

AOUCode: 4-letter species code based on the standardized common English names.

Distance: Estimated distance of detected bird from survey point. 1 = 0-25 m; 2 = 26-50 m; 3 = 51-100 m; 4 = 101-150m; 5 = >150m

Number of birds: Number of birds detected.
Sex: Sex of bird, if known.

Flyover: Number of birds detected flying over the point. Flyover detections have no data (blank) for the field "Number of birds".

DT: Type of detection. 1 = aural; 2 = visual; 4 = aural, then visual. Birds seen before heard are always recorded as DT = 2.

Lloyd, J. D., and G. L. Slater. 2014. Abundance and distribution of mangrove landbirds in Florida.North American Fauna: Number 80:1 – 45.
doi: http://dx.doi.org/10.3996/nafa.80.0001