adehabitat (version 1.8.20)

teal: Teal (Anas crecca) Ring Recovery Dataset

Description

This dataset describes the location and date of recovery of 800 teal ringed in Camargue, southern France between January 1952 and February 1978 using standard dabbling duck funnel traps hidden in the vegetation.

Usage

data(teal)

Format

The following variables are given for each recovery:

x

a numeric vector giving the longitude of the recovery

y

a numeric vector giving the latitude of the recovery

date

a vector of class POSIXct containing the date of recovery. Actually, only the day and month have been indicated. The year of recovery has been set to 1900 or 1901, and should not be taken into account in the analysis.

Details

The Camargue teal ringing program led to the recovery of 9,114 teals after the ringing of 59,187 birds. These 800 recoveries of this dataset are a subsample of the 4,652 birds recovered during the first year following ringing. Note that both the coordinates and the date have been jittered to preserve copyright on the data.

Examples

# NOT RUN {
data(teal)

plot(teal[,1:2], asp=1,
     xlab="longitude", ylab="latitude",
     main="Capture site (red) and recoveries")

points(attr(teal, "CaptureSite"), pch=16,
       cex=2, col="red")
# }