Study area and distribution of urban areas on the Cape Peninsula, South Africa.

• Main Authors: Petra Sumasgutner (2926185), Andrew Jenkins (2600980), Arjun Amar (503756), Res Altwegg (408673)
• Format: Still Image
• Language: unknown
• Published: 2020
• Subjects: Neuroscience; Evolutionary Biology; Ecology; Science Policy; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; urbanisation; performance; timing; weather conditions; weather events; nest boxes; peregrine falcon Falco peregrinus; nest boxes buffer; anthropogenic climate change; Falco peregrinus; peregrine falcon
• Online Access: https://doi.org/10.1371/journal.pone.0234503.g001

Peregrine falcon nest types were categorised as nest boxes (black), nests on buildings without boxes (blue), in quarries (grey) and on natural cliffs (green); photos: Andrew Jenkins. Note that nest locations are senstive information and were not plotted on the map to protect the species. Distribution of the Peregrine falcons and nearest neighbour distances (NND; n = 779 territory occupation records) in relation to (top) the urban gradient [% urban cover] and (bottom) the increasing population density over years [1989–2014]. Red dashed lines indicates the threshold for the ‘urban subset’, which included all four nest types but was restricted to nest locations with >40% urban cover, and the regression lines.