Abstract <p>The cold resistance, the attitude to dissolved oxygen depletion in water, and the overwintering strategy of individuals of one of the intraspecies forms of the Oriental fire-bellied toad, <i>Bombina orientalis</i> f. <i>sylvatica,</i> were studied in the south of Primorye, Russian Far East. It was revealed that individuals of the form studied were unable to tolerate a decrease in the level of dissolved oxygen in water below 6 mg/L and were slightly resistant to negative temperatures (surviving only for 1–4 days at –1.1 ± 0.1°C). The main stereotype of overwintering of <i>Bombina orientalis</i> f. <i>sylvatica</i> was confirmed to be terrestrial hibernation. Similar studies on the second form of the species, <i>Bombina orientalis</i> f. <i>praticola</i>, may confirm the validity of the segregation of these two ecological forms within <i>B. orientalis</i>.</p>