Caspian Hyrcanian mixed forests an important resting area for birds migrating between Russia and Africa and is thus a key habitat for many bird species. Some outstanding birds that can be found here are the greylag goose ("Anser anser"), white-fronted goose ("Anser albifrons"), Little bustard ("Tetrax tetrax"), glossy ibis ("Plegadis falcinellus"), Eurasian spoonbill ("Platalea leucorodia"), night heron ("Nycticorax nycticorax"), red-breasted goose ("Branta ruficollis"), peregrine falcon ("Falco peregrinus"), Dalmatian pelican ("Pelecanus crispus"), Western cattle egret ("Bubulcus ibis"), squacco heron ("Ardeola ralloides"), greater flamingo ("Phoenicopterus roseus"), white-headed duck ("Oxyura leucocephala"), and Caspian snowcock ("Tetraogallus caspius"). The diversity and endemism of the species represented in the ecoregion
Porphyria cutanea tarda the body. Certain mutations in the "HFE" gene cause hemochromatosis (an iron overload disorder). People who have these mutations are also at an increased risk of developing porphyria cutanea tarda. In the 20% of cases where porphyria cutanea tarda is inherited, it is inherited in an autosomal dominant pattern, which means one copy of the altered gene is sufficient to decrease enzyme activity and cause the signs and symptoms of the disorder. While inherited deficiencies in uroporphyrinogen decarboxylase often lead to the development of PCT, there are a number of risk factors that can both cause and exacerbate the symptoms