Planning and monitoring

 Captive breeding expenses

  Difficult to value reintroduction benefits

  Permission of different groups

  Capturing and transporting animals- stress, injury, fatalities

  Expertise and equipment

  Intact social groups

  Difficulties of breeding

  Predator prey interactions

  Small groups susceptible to disease

  Exposure to diseases in captivity

  Endemic diseases- lack of immunity

Site availability and suitability- space, predation and competition

  Not large area in the UK

  Proximity to populated areas

  Available food and habitat

  Population density needed to produce viable populations

  Agreement of agencies involved e.g. Scottish Natural Heritage

  Predation

  Food chain disruption- changes in environmental setting since removal

  Disease resistance

  Creation of bottle necks in the gene pool ( Foose, 1991)

Public

  Feeling threatened- e.g. wolves (Glasgow Zoo, 2002)

  Differences in perception of species reintroduction by urban and rural dwellers

  Wolves

  Beavers