Pied-billed Grebe (Podilymbus podiceps) - Details the range, habitat, nesting, and diet of this species. - http://www.npwrc.usgs.gov/resource/birds/forest/species/podipodi.htm
Eared Grebe (Podiceps nigricollis) - Range, status, habitat, special habitat requirements, nesting, and diet. - http://www.npwrc.usgs.gov/resource/birds/forest/species/podinigr.htm
Red-necked Grebe (Podiceps grisegena) - Food habits, nesting, physical appearance, and management considerations for this species. - http://www.dnr.state.wi.us/org/land/er/factsheets/birds/Rdnkgr.htm
Clark's Grebe (Aechmophorus clarkii) - Fact sheet describes this bird's habitat, nesting, and identifying characteristics. Includes a photo. - http://www.mbr-pwrc.usgs.gov/id/framlst/i0011id.html
Nocturnal Foraging by Western Grebes - Facts about the feeding habits of Aechmophorus occidentalis on its wintering grounds. - http://webs.ii.ca/clowater