Ducks Unlimited iCEV Exam

general vocabulary for the ducks unlimited iCEV Exam

Ecology & Biology (The Science) 

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Abiotic vs. Biotic:

Non-living (water, soil, sun) vs. living (plants, animals, bacteria) components of an ecosystem.

Bioaccumulation

The buildup of substances, such as pesticides or heavy metals, in an organism. 

Ecotone

A transition area between two biological communities (e.g., where a forest meets a grassland). This area usually has the highest biodiversity.

Bag Limit

The maximum number of a specific animal a person is legally allowed to harvest in a single day.

Photoperiodism

The functional response of an organism to the length of day or night (this is what tells ducks when to migrate)

Habitat Management (The Work) 

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Sustained Yield

The amount of a resource that can be harvested without reducing the base stock (harvesting only the "interest," not the "principal").

Prescribed Burning

A controlled fire applied to a specific area to improve habitat health and reduce "fuel" for wildfires.

Mitigation:

The process of creating, restoring, or enhancing an ecosystem to make up for an area that was destroyed by development.

Basal Area:

Measurement used in forestry to determine the density and "crowding" of trees in a stand.

Invasive Species

A non-native species whose introduction causes economic or environmental harm (e.g., Nutria or Phragmites in wetlands).

Law & History (The Specifics) 

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George Bird Grinnell

Known as the "Father of American Conservation"; he founded the Audubon Society. and co-founded the Boone and Crockett Club (1887) with Theodore

Theodore Roosevelt 

The "Conservation President" who established the first National Wildlife Refuge (Pelican Island). MAde boon and crocket club

Weeks-McLean Act (1913)

An early attempt to give the federal government power to regulate hunting of migratory birds (later replaced by the MigratoryBirdTreatyAct). 

Pesticide Control Act (1947)

Important for understanding how bird populations (like eagles and ducks) were protected from chemicals like DDT

Species Identification Details 

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Sexual Dimorphism

When males and females of the same species look different (e.g., a bright green-headed Mallard drake vs. a brown hen).

Lamellae

The comb-like structures inside a duck’s bill used for straining food from the water. kind of looks like tiny little teeth

Drake vs. Hen

Male vs. Female waterfowl.

Juvenile

A bird that has not yet reached adult plumage or sexual maturity. 

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Speculum (Wing patch) 

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Rump 

3?

Crown (top of head)

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culumen (top ridge of the bill)

Anatidae

Ducks, Geese, Swans

All belong to the order Anseriformes.

Cervidae

Deer, Elk, Moose

They grow and shed antlers every year.

Falconidae

Falcons, Kestrels, Caracaras

Diurnal birds of prey with notched beaks; known for speed.

Canidae

Coyote, Fox, Wolf

Non-retractable claws; social hunters.

Mustelidae

Otter, Mink, Weasel

Known for being carnivorous and having musk glands.

Phasianidae

Turkey, Pheasant

Ground-nesting birds; high reproductive rates.