The tundra swans prefer the flooded rice fields because they mimic the flat, ... Through January, the swans will feed on aquatic invertebrates and leftover grain in the fields.

Only three species of swans nest in North America: the trumpeter swan, the mute swan and the tundra swan (sometimes known as ...

Invertebrates from estuarine and tundra habitats have distinctly different carbon-isotope ratios 4. Diet-based differences in carbon-isotope ratios are expressed in bird tissues, including eggs ...