swallows {blmeco} | R Documentation |
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 providedndaysempty
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
data(swallows)