1. Minnesota Ornithology Heidi Heldberg & Nichole Christensen

2. Introduction to Ornithology Birds (class Aves) are winged, endothermic, vertebrate animals that lay eggs. There are over 9,000 species of birds known to us today. Modern birds are characterized by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton.

3. Common Loon (Gavia immer) Food sources: Minnows, Crayfish, Frogs, Leeches and Aquatic Insects

4. Great Blue Heron (Ardea herodias) Food Sources: small fish, shrimps, crabs, aquatic insects, rodents, other small mammals, amphibians, reptiles, and small birds.

5. Canada Goose (Branta canadensis)

6. Works Cited Google Images (10/26/09) www.whatbird.com