Table 6.

Summary of findings from grey literature * for information sources and recommendations consistent with or specifying < 1 × snake length (SL) minimum enclosure size.

Reference	Information Source	Author Credentials	Recommendation	Information/Evidence Base
Basque Country, 2008 [117]	Government guidance	Anonymous	≥2/3 SL	Common practice, consensus opinion
NSW, 2013 [109]	Government guidance	Anonymous	0.5 SL	Common practice, consensus opinion
Kaplan, 2014 [108]	Online guidance	Biologist	Terrestrial/fossorial 75% SL	Common practice, opinion, ‘rule of thumb’
Barcelona, 2014 [111]	Government guidance	Anonymous	≥2/3 SL	Common practice, consensus opinion
Defra, 2018 [118]	Government guidance	Anonymous	≥2/3 SL	Common practice, opinion
Victoria State Government, 2020 [119]	Government guidance	Anonymous	0.45 SL	Common practice, opinion
Queensland Government, 2020 [110]	Government guidance	Anonymous	Larger snakes ~50% SL	Common practice, opinion

* Government or other report or scientific letter identified through Google Scholar. Keys: 0.45 SL = less than half snake length as minimum primary linear dimension of enclosure. 0.5 SL = half snake length as minimum primary linear dimension of enclosure. ~50% SL = approximately half snake length as minimum primary linear dimension of enclosure. >2/3 SL = equal to or greater than two-thirds snake length as minimum primary linear dimension of enclosure. 75% SL = three-quarters snake length as minimum primary linear dimension of enclosure.