Count data for the Willow tit (from Kéry and Royle 2010)

Repeated count data for the Willow tit (Poecile montanus, a pesserine bird) in Switzerland on the period 1999-2003. Data come from the Swiss national breeding bird survey MHB (Monitoring Haüfige Brutvögel).

Format

data.Kery2010 is a data frame with 264 observations (1 km^2 quadrats) and the following 10 variables.

coordx

quadrat x coordinate

coordy

quadrat y coordinate

elevation

mean quadrat elevation (m)

forest

quadrat forest cover (in %)

count1

count for survey 1

count2

count for survey 2

count3

count for survey 3

juldate1

Julian date of survey 1

juldate2

Julian date of survey 2

juldate3

Julian date of survey 3

Source

Kéry and Royle, 2010, Journal of Animal Ecology, 79, 453-461.

References

Kéry, M. and Andrew Royle, J. 2010. Hierarchical modelling and estimation of abundance and population trends in metapopulation designs. Journal of Animal Ecology, 79, 453-461.