HubbardBrook {AHMbook}R Documentation

Warbler point count data from the Hubbard Brook Experimental Forest


Three replicated point counts of 10 min each, out to a maximum distance of 100 m, were conducted in each spring between 1999 and 2018 at a total of 373 locations in the Hubbard Brook Experimental Forest in New Hampshire. This data set contains the data for the following 13 species:




HubbardBrook is a list with 4 elements:


a sites x replicates x years x species array of counts, the number of unique individuals detected within 50m of the point count location.


a data frame with rows for 373 sites and the following columns:

  • PlotID : a numeric site identifier.

  • Longitude : the longitude of the point (WGS84); 2 sites have missing data.

  • Latitude : the latitude of the point (WGS84); 2 sites have missing data.

  • Elev : the elevation of the point, m.

  • Aspect : aspect of the sample location (degrees).

  • Slope : slope of the sample location.

  • Forest : general forest cover type of sample location.


a sites x replicates x years array of ordinal day of count (1 Jan = 1); NA entries occur when surveys were not carried out.


a sites x replicates x years array with the start time of the survey, hours after midnight.


Rodenhouse N.L. & Sillett, T.S. (2019) Valleywide Bird Survey, Hubbard Brook Experimental Forest, 1999-2016 (ongoing). Environmental Data Initiative. <>. Dataset accessed 2020-01-07.


Betts, M.G., Rodenhouse, N.L., Sillett, T.S., Doran, P.J. & Holmes, R.T. (2008). Dynamic occupancy models reveal within-breeding season movement up a habitat quality gradient by a migratory songbird. Ecography 31:592–600.

Goetz, S.J., Steinberg, D., Betts, M.G., Holmes, R.T., Doran, P.J., Dubayah, R., & Hofton, M. (2010). Lidar remote sensing variables predict breeding habitat of a Neotropical migrant bird. Ecology 91:1569–1576.

Van Tatenhove, A., Filiberti, E., Sillett, T.S., Rodenhouse, N.L. & Hallworth, M. T. (2019). Climate-related distribution shifts of migratory songbirds and sciurids in the White Mountain National Forest. Forests 10:84.

Kéry, M. & Royle, J.A. (2021) Applied Hierarchical Modeling in Ecology AHM2 - 8.2.



[Package AHMbook version 0.2.9 Index]