[Since the mid Fifties data have been published stating the presence of a Willow Tit population on the Central Apennines. The Authors, after controlling all available information and comparing them with the morphological and eco-ethological features of the species, hypothesize that all Willow Tit recorded observations relate instead to Marsh Tit, concluding that no Willow Tit populations were ever recorded in the area].
[Article in Italian]