An investigation into a suitable reintroduction location for the red-billed chough (Pyrrhocorax pyrrhocorax) using habitat analysis and population modelling

Abstract

Red-billed Chough (Pyrrhocorax pyrrhocorax) are a Corvidae species, with prominent red bill and legs. Their population declined throughout the 19th and 20th Centuries, becoming locally extinct across Kent, England where they remain on the coat of arms for Canterbury, Kent Reintroductions have already been conducted in Cornwall, Jersey and Kent. The next step is to reintroduce a further population within South-East England, to function as a ‘stepping-stone’ and to allow for the genetic exchange between these existing populations. The South Downs National Park was identified as the appropriate place for the reintroduction to take place, as it contains ample of food and optimal habitat. A map of the South Downs created using QGIS, highlighted areas both to target and avoid. Ideal locations include Selborne Common, Iping and Stedham/Trotten Common and Saddlescombe farm. Towns to avoid include Lewes, Petersfield, Midhurst and Liss, due to likelihood of human disturbance. Vortex modelling revealed that an initial release of eight chough, with a further two being supplemented every other year, for 7 years would allow the population to be self-sustaining. The initial release should consist of adults, with future supplementation including a male and female aged 1-2 years.

Date of Award	2025
Original language	English
Awarding Institution	Canterbury Christ Church University