Rundblättriger Sonnentau
In 1972, 10 chamois were brought to Siriu and released in the wilderness of the mountain ranges. As of 2007, their number has risen to around 60. One of the largest firs in Romania, measuring 62 meters in height and 2.5 meters in diameter, grows in a forest in Siriu. A protected plant, Drosera rotundifolia, can also be found in the Siriu forests.