from the true name of the animal. A list of a few fur-bearing mammals of
the United States having trade names differing from the true names
follows:

_The True Fur_ _The Trade Name_
Dark blended Muskrat Russian Otter
Mink blended Muskrat Natural River Mink
Natural Muskrat[6] River Mink
Natural Jersey Muskrat River Sable
Plucked and Seal-dyed Muskrat Hudson Seal
Plucked and Seal-dyed Muskrat Aleutian Seal
Skunk Black Marten
Striped Skunk Civet Cat
N.Y. Weasel in winter pelage Ermine

[Illustration: SKUNKS--MOTHER AND YOUNG HUNTING FOR GRASSHOPPERS AND
CRICKETS

Noted for its ability to emit a most unpleasant odor when disturbed.
Range: Eastern North America. Portion of Group in American Museum of
Natural History.]

[Illustration: MINK

A cousin of the Weasel and Otter, the Mink feeds upon frogs, crayfish,
mice, bird's eggs, etc. Range: This and closely related forms over most
of United States, Canada, and Alaska. From Group in American Museum of
Natural History.]

A few suggestions for observation or study:

1. What peculiar instinct or habit has the Opossum developed?

2. How does the flight of a Bat differ from that of a Flying Squirrel?

3. Can you notice any peculiarity in the Rabbit's track?

4. Mention three mammals that hibernate.

5. Describe the methods of defense in the following mammals: Armadillo,
Porcupine, Skunk.

6. Why do the front teeth of the Squirrel and the Beaver continue to
grow?

The best way to find the answers to these questions is by actual
observation of the animals, but when this is impossible, the references
given under "Mammals" will be found useful.

[Illustration: RED FOX RETURNING TO ITS YOUNG FROM SOME FARMER'S
HEN-ROOST

The Cross Fox, the Silver Fox, and the Black Fox are color phases of the
Red Fox, and not different species. Range: Northern North America south
to Georgia. Habitat Group in American Museum of Natural History.]

[Illustration: BALD-EAGLE

The American Eagle, the Emblem of our Country. Range: United States]

Birds

_He who takes the first step in ornithology is
ticketed for the whole trip._--_John Burroughs._

[Illustration: A GREBE COLONY IN SASKATCHEWAN

Showing the Western Grebe and the smaller Grebe. Note