What's the trophic levels or positions in common teal, Gray lag goose, Mallard and Pintail? What types of food they use in their food chain?

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Fabrizio Borghesi

Common Teal = invertebrates, aquatic plants, seeds

Graylag Goose = herbivorous

Mallard and Pintail = invertebrates, small vertebrates (fishes), aquatic plants, seeds

Thilina Nethmin De Silva

Position depends. either 2nd or 3-4th in certain cases.

André Günther

Graylag Goose = 2

the ducks = (2)3(4), more difficult, depends from season too