Figure 1. Counts of the most recommended materials to use for reptile
and amphibian fencing across the twelve best practice guidelines
From 2015 onwards guidelines began suggesting opaque fencing
(Table 4 ), with the exception of Caltrans recommending the use of
woven polypropylene or polyethylene sheets for temporary projects, as
well as the Western Institute for Transportation suggesting adaptations
to chain-link and the Spanish Ministry of Agriculture, Food and the
Environment suggesting standard mesh (2cm x 2cm) (Table 4 ). In
the reviewed guidelines, conservation and non-governmental organisations
often recommend opaque panels, whereas government departments often
recommend thin plastic or mesh-based materials as well (Table 4 ).
Table 4. A summary of the recommended materials to use for reptile and
amphibian fencing across the 22 year period that these best practice
guidelines have been published in