### animal | vertebrate | bird | waterfowl | duck:

Black duck
* Most black ducks have brown plumages
* are closely related to mallards and are often mistaken for females of that species
* eat invertebrates and seeds in bottomland hardwoods.
  - no white coloration above the speculum
* use wetlands for nesting and raising young.

Bufflehead
* are birds
  - compact, with a short neck and a short narrow grey bill
  - ducks
  - fast fliers with rapid wing-beats
  - sexually dimorphic in plumage as well as overall size
  - usually a coastal bird although inland sightings are occasional
* form monogamous pairs.
* often nest in trees, in abandoned flicker nest cavities.
* typically eat aquatic insects, snails, crustaceans and aquatic plants.

### animal | vertebrate | bird | waterfowl | duck:

Canvasback
* Most canvasbacks have feet
  - large web feet
  - light brown heads
* Some canvasbacks have eclipse plumages
* are among the fastest flying of all waterfowl
  - capable of breeding in the year after hatching
  - important members of healthy, aquatic ecosystems
  - omnivorous, eating both plants and animals as they are available
  - powerful swimmers
  - protected as migratory gamebirds in the United States, Mexico, and Canada
  - traditionally popular with hunters
  - usually quiet during non-breeding season
* belong to a group of waterfowl known as pochards, or diving ducks.
* breed in the Prairie Pothole Region of North America
  - once yearly
* build floating nests among cattails and other emergent aquatic plants.
  - red heads
  - rusty red heads
* includes air sacs
  - bird's feet
  - brains
  - breasts
  - cell membranes
  - cells
  - chest cavities
  - chests
  - corpi
  - cytoplasm
  - ears
  - faces
  - flight feathers
  - mouths
  - nuclei
  - plasma membranes
  - quill feathers
  - rib cages
  - second joints
  - sections
  - skulls
  - sterna
  - talons
  - vacuoles
  - wishbones
* migrate late in fall and early in spring.
* prefer marshes and large open bodies of water such as lakes, ponds and bays.
* travel along three major migration corridors, or flyways.
* use their long, sloping bill to dig in the bottom sediments for food.
* usually take new mates each year, pairing in late winter on ocean bays.

### animal | vertebrate | bird | waterfowl | duck | canvasback:

Female canvasback
* Female Canvasbacks are an overall grayish-brown in color, with a slightly browner head and neck.
* Most female canvasbacks have heads
  - light brown heads
* have a light brown head and neck, grading into a darker brown chest and foreback

Male canvasback
* Most male canvasbacks have rusty red heads.
* have a rusty red head and neck, a black breast and a white body

Dive duck
* Most dive ducks eat fish.
* Most dive ducks feed on aquatic plants
* have ability
  - strong ability

### animal | vertebrate | bird | waterfowl | duck:

Diving duck
* dive deep to get their food.
* face the strongly cooling properties of aquatic environments.
* have a lobed hallux and lack iridescence in the speculum.
* spend their time in large, deep lakes and rivers.
* use their lamellae to catch and hold freshwater shrimp and other invertebrates.
+ Duck: Poultry
  * Ducks give live birth twice a year and are omnivorous, eating aquatic plants and tiny animals. Dabbling ducks feed on the surface of water or on land, or as deep as they can reach by up-ending without completely submerging. Along the edge of the beak there is a comb-like structure called a 'pecten'. This strains the water squirting from the side of the beak and traps any food. The pecten is also used to preen feathers. Diving ducks dive deep to get their food.