AHMbook (version 0.2.10)

FrenchPeregrines: Data for observations of peregrines from the French Jura mountains

Description

The data are detection/nondetection data of the Peregrine Falcon (Falco peregrinus) from the wild and wonderful French Jura between 1964 and 2016 for 284 cliff sites (= territories, or sites in the context of a site-occupancy model) where a pair had been detected at least once in this period. A large proportion of sites are visited multiple times per year, but unfortunately only the aggregate results are available in each year, i.e., whether a pair was detected at least once, or never.

Usage

data("FrenchPeregrines")

Format

FrenchPeregrines is a data frame with 284 rows and 56 columns:

site

cliff (or site) identifier.

department

factor, the administrative area (Ain, Jura or Doubs).

height

factor, height of the cliff, low, medium, or tall.

yr1964 to yr2016

detection histories for each year: 1 if a pair of peregrines was detected during at least one survey, 0 if no pair was detected, NA if no survey was carried out in that year.

References

Kéry, M. & Royle, J.A. (2021) Applied Hierarchical Modeling in Ecology AHM2 - 4.11.

Examples

data(FrenchPeregrines)
str(FrenchPeregrines)
# Extract the capture history data:
ch <- as.matrix(FrenchPeregrines[, 4:56])
dim(ch)
range(ch, na.rm=TRUE)