Compléter Mercury in birdsVersion en ligne Fill in the blanks based on FIGURE from scientific publication. par Anna Wielgopolan 1 Gadwall bittern trophic Hg lowest Mallard hoopoe highest Northern Common insectivorous pintail Greylag bittern Eurasian Little higher significant goose omnivorous concentrations in the feathers of birds from FIW ranged from 0 . 005 ± 0 . 002 ? g g ? 1 d . w . ( ) to 0 . 380 ± 0 . 047 ? g g ? 1 d . w . ( ) . In general , the average Hg concentration in the feathers from the to value was as follows : Greylag goose > ? ? > ? > Common hoopoe . There was a difference between these species . The Greylag goose had significantly Hg levels in their feathers than did the other species . Differences in Hg concentrations in feathers were also tested according to the level according to the dietary habits of the birds : omnivorous , piscivorous , and . The mean Hg concentrations in these three trophic levels decreased in the following order : > piscivorous > insectivorous .