blmeco (version 1.4)

swallows: Data set with number of nesting swallows per barn

Description

Number of barn swallows and house martins nesting per barn with some characteristics of the barn.

Usage

data(swallows)

Format

A data frame with 27 observations on the following 6 variables.

farm

indicator of the farm

nhirrus

number of active barn swallow nests

ndelurb

number of active house martin nests

ncows

number of cows in the barn

nesting_aid

a factor with levels artif_nest=artificial nests were put up, both both artificial nests and supporting material has been provided, none nothing has been done to support swallow nesting, support supporting material has been provided

ndaysempty

number of days the barn was empty, i.e. the cows have been on the meadow.

References

Willi T, Korner-Nievergelt F, Grueebler MU (2011) Rauchschwalben Hirundo rustica brauchen Nutztiere, Mehlschwalben Delichon urbicum Nisthilfen. Der Ornithologische Beobachter 108: 215-224

Examples

# NOT RUN {
data(swallows)

# }