birds {unmarked}

BBS Point Count and Occurrence Data from 2 Bird Species

Description

Data frames for 2 species from the breeding bird survey (BBS). Each data frame has a row for each site and columns for each sampling event. There is a point count and occurrence–designated by .bin– version for each species.

Usage

data(birds)

Format

catbird

A data frame of point count observations for the catbird.

catbird.bin

A data frame of occurrence observations for the catbird.

woodthrush

A data frame of point count observations for the wood thrush.

woodthrush.bin

A data frame of point count observations for the wood thrush.

Source

Royle J. N-mixture models for estimating population size from spatially replicated counts. Biometrics. 2004. 60(1):108–115.

Examples

data(birds)