Eurasian bittern
There is a large population of Cetti's warbler ("Cettia cetti") at the site, and Eurasian bittern ("Botaurus stellaris") are resident. Slapton Ley is the only UK site for strapwort ("Corrigiola litoralis"), a plant identified by Natural England as being at high risk of going extinct by 2020. Seed taken from the site, and grown at Paignton Zoo were successfully replanted at Loe Pool, Cornwall in May 2015; where it had previously been recorded since 1915.