Polysticta stelleri: differenze tra le versioni

L'edredone di Steller è una delle specie protette dall'''Agreement on the Conservation of African-Eurasian Migratory Waterbirds'' ([[AEWA]]). In [[Alaska]] è attivo un piano di recupero.<ref name ="MMS2007">{{cite web | author = Minerals Management Service, Alaska | title = Foraging Ecology of Common Ravens (''Corvus corax'') on Alaska’s Coastal Plain (AK-93-48-51) | publisher = Minerals Management Service | date = 2007 | url = http://www.mms.gov/alaska/ess/ongoing_studies/biology/Gleason%20-%207B.pdf | accessdate = 2007-05-24}}</ref>

 

 

==Note==