The names given to the various lines of a tooth on a gear-wheel are as follows: In Figure 233, A is the face and B the flank of a tooth, while C is the point, and D the root of the tooth; E is the height or depth, and F the breadth. P P is the ... Read more of Drawing Gear Wheels at How to Draw.caInformational Site Network Informational
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Most Viewed

Cinnamon Teal
In the Pacific Flyway, cinnamon teal are far more common th...

Puddle Ducks
Puddle ducks are typically birds of fresh, shallow marshes ...

Ringneck
Length--17 in. Weight--2 lbs. Similar in appearance to...

Canvasback
Length--22 in. Weight--3 lbs. Normally late to start so...

Pintail
Length--26 Weight--1 lbs. These ducks use all four fly...

Goldeneye
Common--Length--19 in. Weight--2 lbs. Barrow's...

Mallard
Length--24 Weight--2 lbs. The mallard is our most comm...

Diving Ducks
Diving ducks frequent the larger, deeper lakes and rivers, ...

What To Look For
Differences in size, shape, plumage patterns and colors, wi...

Eclipse Plumage
Most ducks shed their body feathers twice each year. Nearly...


Least Viewed

Black Scoter
Length--19 in. Weight--2 lbs. In flight, drakes appea...

Scaup
Greater--Length--18 in. Weight--2 lbs. Lesser...

Black Duck
Length--24 in. Weight--2 lbs. A bird of the eastern St...

Redheads
Length--20 in. Weight--2 lbs. Range coast to coast, wi...

Hooded Merganser
Length--18 in. Weight--1 lbs. Often seen in pairs, or ...

White-winged Scoter
Length--21 in. Weight--3 lbs. The three scoters on th...

White-fronted Geese
Length--29 in. Weight--6 lbs. Migrates chiefly in the ...

Blue-winged Teal
Length--16 Weight--15 oz. Their small size and twisting...

Harlequin
Length--17 in. Weight--1 lbs. Glossy slate-blue plumag...

Snow Geese
Length--29-31 in. Weight--6-7 lbs. Two races of snow ...



Gadwall








Length--21
Weight--2 lbs.

Gadwalls are most numerous in the Central Flyway, but not too common
anywhere. They are often called gray mallards or gray ducks. They
are one of the earliest migrants, seldom facing cold weather.

They are the only puddle ducks with a white speculum.

Small, compact flocks fly swiftly, usually in a direct line. Wingbeats
are rapid.

Drakes whistle and kack-kack; hens quack like a mallard, but softer.





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