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Fig. 2 | Avian Research

Fig. 2

From: Rapid increase in numbers and change of land-use in two expanding Columbidae species (Columba palumbus and Streptopelia decaocto) in Algeria

Fig. 2

Annual variations in the number of pairs of the Woodpigeon and Eurasian Collared Dove in the park of the National High School of Agronomy (ENSA) during the period 1992–2010. Dashed red lines are predicted curves obtained from a curvilinear regression (four-parameter logistic model) with the ‘SSfpl’ function in R. Continuous blue lines are LOESS curves (locally weighted polynomial) fitted to the data with a 95 % confidence interval region using the package {ggplot2} in R

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Avian Research

ISSN: 2053-7166