University of Idaho Extension UI   |     CALS   |     EXTENSION
MASTER GARDENERS | EVENTS | SEASONAL TOPICS | GET ANSWERS                                                                             HOME
GARDENING BASICS FRUIT, VEGETABLES & HERBS TREES, SHRUBS & VINES LAWN & TURF HERBACEOUS ORNAMENTALS INSECTS, DISEASES & WEEDS WILDLIFE IN
THE GARDEN
PLANT YOUR LANDSCAPE
  HOME:   WILDLIFE IN THE GARDEN:    SNAKES: WESTERN RATTLESNAKE
BENEFICIAL INSECTS
Helping Beneficial Insects
Lady beetles
Damsel bug
Green lacewings
Hover(syrphid) flies
Minute pirate bugs
Parasitic wasps
Predacious ground beetles
Spiders
Tachinid flies

BIRDS
Hosting songbirds in your garden
Grow natives
West Nile virus

MAMMALS
Deer
Marmots
Rabbits
Raccoons
Skunks
Voles

SNAKES
Snakes
Garter snakes
Gopher snakes
Western rattlesnakes

Rattlesnake
(c) Loren Thomas 2003

Description: Western rattlesnakes have large, triangular heads, narrow necks, and dark brown or black blotches on lighter backgrounds. They can be up to 65 inches long. Unless they're newborn or have been injured, all have rattles at the ends of their short tails. They kill their prey by injecting venom with two large fangs, then swallowing them whole. Three subspecies (Prairie, Great Basin, and Northern Pacific) live in Idaho; they differ mostly in their color patterns, which typically resemble their environments.

Native habitat: Western rattlesnakes are found throughout Idaho, except at high elevations and in the northern part of the state. They prefer dry, rocky areas with sparse vegetation.

Behavior: Western rattlesnakes eat mostly mice, ground squirrels, and rabbits. They're active from March to November, generally hunting throughout the day in moderate temperatures but preferring the earlier and later hours during the warm summer months. They seek their prey in or near tall grass, rodent burrows, rock outcrops, surface objects, or in the open, and they take shelter in crevices, caves, mammal burrows, and sometimes dense vegetation.

Managing conflicts: Western rattlesnakes are rarely found in Idaho yards, but homeowners living at the urban-rural interface may occasionally see one. Be aware that well-camouflaged rattlesnakes may be waiting quietly for prey in rock crevices, under logs, in heavy brush, or even in tall grass, and be careful where you put your hands and feet. If you hear or see a rattlesnake, move slowly away from it. Few people are bitten by rattlesnakes in Idaho and, although pets have died, no human fatalities have been recorded. You should consider asking for assistance from a wildlife biologist or pest management professional if rattlesnakes are frequenting your yard. Plan to take steps to reduce your yard's attractiveness to snakes.

In the event of a rattlesnake bite:
  • Try to calm the victim.
  • Gently wash the area with soap and water.
  • Apply a cold, wet cloth over the bite.
  • Transport the victim to the nearest emergency facility for further treatment.
  • Do not: apply a tourniquet, pack the bite area in ice, cut the wound with a knife or razor, use your mouth to suck out the venom, let the victim drink alcohol, or apply electric shock.


Information courtesy of:

arrow up top