Many populations of the long-tailed duck (Clangula hyemalis), a species of seaducks (Mergini) living around the northern hemisphere, have gone down in size in recent decades and further knowledge of its evolutionary history and population structure could prove useful in its protection.
Hávella (Clangula hyemalis) er tegund sjóanda (Mergini) sem lifir kringum norðurhvelið. Stofnum hennar hefur víða hnignað nýlega og þekking á þróunarsögu og stofnskiptingu tegundarinnar gæti nýst við verndun hennar.