Captive breeding and reintroduction programs are important tools for the establishment of threatened animal populations, but experimental approaches require to compare the outcomes of these programs that will increase post-release survival. The Kaiser’s Mountain Newt, Neurergus kaiseri is listed as a vulnerable by IUCN criteria, to aid about the ecology and the conservation of this species, we carried out a trial release of 20 newts reared in captivity on 4 occasions during the spring and summer of 2015 into wild in western Iran. First, we built a soft-release enclosure for acclimation to the environment in cages with two age groups (2 and 4-year-old) for 9, 10 and 11 weeks and monitored during these weeks. After the acclimation period, newts
