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)

Hammerhead Shark

Sphyrna lewini

Size:
to 13 ft

Habitat:
coastal waters

Notes:
dangerous

Hammerhead Shark

Sharks such as the Hammerhead, that have their eyes positioned on lateral extensions of their heads belong to the family Sphyrnidae. ( Sphyrna is Greek for hammer. ) Four species occur in the region:

  • Scalloped Hammerhead Sphyrna lewini - most common
  • Smooth Hammerhead, Sphyrna zygaena - most northerly
  • Great Hammerhead, Sphyrna mokarran - largest, mainly tropical
  • Bonnethead, Sphyrna tiburo - smallest