AHMbook (version 0.2.5)

spottedWoodpecker: Data for observations of Middle Spotted Woodpecker in Switzerland

Description

The data set is based on checklists which volunteers submit from their bird-watching trips and which were then summarized by day and site (1 km2 quadrat) such that we have the number of surveys (= checklists) per quadrat and day, and the number among these on which a Middle-Spotted Woodpecker was recorded, during 162 days (Julian days 51<U+2013>212, corresponding to 20 February<U+2013>31 July). There are data from a total of 144,517 recorded surveys on 116,204 day/quadrat combinations during 26 years from 1545 1 km2 quadrats in which the species was ever recorded in Switzerland since 1985.

Usage

data("spottedWoodpecker")

Format

spottedWoodpecker is a data frame with 116,204 rows and 7 columns:

site

quadrat identifier.

coordx, coordy

the x and y coordinates of the center of the quadrat; the coordinate reference system intentionally not specified.

year, jdate

the year and Julian date of the observations.

y

the number of surveys during which the species was detected.

nsurveys

the number of recorded surveys in the quadrat on that day.

References

K<U+00E9>ry, M. & Royle, J.A. (2021) Applied Hierarchical Modeling in Ecology AHM2 - 4.11.2.

Examples

# NOT RUN {
data(spottedWoodpecker)
str(spottedWoodpecker)
# }