Mallard Duck

Mallard

Anas platyrhinchos

Size: 20-28"

Habitat: in and around water

Notes:
There are many types of wild ducks, found worldwide in all freshwater and marine environments. The Mallard ( male shown ) is typical. Females are much drabber. Only domestic ducks are white.

Most ducks feed on water plants; some species feed on fish.

Mallard male
Mallard female
Mallards - male (top) and female (bottom)

Scotch boiler ( cutaway )
A typical Scotch boiler ( cutaway )

Boilers are one of the most common shipwreck features, found on almost all engine-powered vessels. The purpose of a boiler is to produce high-pressure steam for the engine to propel the vessel. Steam boilers have been in use from the early 1800s to the present day.

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