| Western diamondback rattlesnake | Arizona's largest rattlesnake (to about 5.5 ft). Gray-tan with dark-edged diamond blotches peppered with dark specks; black and white tail bands of equal width ("coon tail"); light eye stripe runs down to the lip. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Mojave rattlesnake | Greenish-gray to tan with diamonds; white tail bands wider than the black ones; eye stripe passes above the corner of the mouth. Often confused with the diamondback. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Sidewinder | Small (under 2.5 ft), pale sandy color, raised hornlike scale above each eye; moves sideways, leaving J-shaped tracks. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Black-tailed rattlesnake | Yellow-olive to greenish with dark crossbands; solid black tail and usually a dark snout. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Tiger rattlesnake | Small head for its body, gray to pinkish with narrow dark crossbands (tiger stripes) rather than diamonds. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Southwestern speckled rattlesnake | Color matches local rock (pinkish, tan, gray) with speckled, salt-and-pepper bands; rough-looking scales. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Arizona black rattlesnake | Adults very dark: black to dark brown or gray, often with lighter crossbars; young are lighter and blotched. Can darken and lighten. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Prairie rattlesnake (incl. Hopi rattlesnake) | Greenish-tan to brown with dark blotches that become bands near the tail; light stripes on the face. | Call 911 and get to a hospital with antivenom; car keys and phone are the best snakebite kit. Keep still and calm, remove rings, watches, and tight clothing, and keep the limb near heart level. No cutting, suction or "extractors", tourniquets or tight bands, ice, electric shock, or alcohol. Don't try to catch or kill the snake; treatment is the same for every Arizona rattlesnake. Poison Center: 1-800-222-1222. |
| Sonoran (Arizona) coral snake | Small (usually under 2 ft), slim, with red, yellow (or white), and black rings that go all the way around the body; black head. Red touches yellow. | Don't handle it. If bitten, go to a medical facility without delay even if you feel fine, and call 1-800-222-1222. |
| Gila monster | Heavy lizard (to about 22 in) with beadlike skin in black and pink, orange, or yellow patterns; fat tail; slow-moving. | Remove the lizard quickly (pry the jaws open with a strong stick while it keeps its feet on the ground). Irrigate the wound with water, keep the limb at heart level, call 1-800-222-1222, and go to a medical facility (broken teeth may be in the wound; check tetanus). |
| Arizona bark scorpion | Small (to about 1.5 in), straw-yellow to tan, with slender pincers and a thin tail. Climbs walls and ceilings; glows under UV light. | Wash with soap and water, apply a cool compress, keep the limb comfortable, and use over-the-counter pain relief. Call 1-800-222-1222 to decide if a hospital visit is needed; go immediately for young children or severe symptoms. |
| Western black widow | Female glossy black, round abdomen with a red or orange hourglass underneath. Messy, strong, irregular web low to the ground. Males are small and brown. | Wash with soap and water, cool compress, keep the limb near heart level, OTC pain relief. Call 1-800-222-1222; children under 5 and adults with severe symptoms may need hospital care. |
| Arizona brown spider (recluse relative) | Light tan to brown, about nickel-to-quarter size with legs; violin-shaped mark on the front body; six eyes in pairs. Shy. | Keep the bite clean with soap and water and get medical treatment; call 1-800-222-1222. |
| Africanized honey bees | Look the same as ordinary honey bees; only behavior tells: they defend a wide area around the hive and chase people for a long distance. | Run to a car or building, covering your face; don't swat or stop, and don't jump into water (bees wait). Remove stingers within seconds by any means. Call 911 for many stings or any allergy signs (welts, trouble breathing); otherwise 1-800-222-1222. |
| Kissing bugs (conenose bugs) | About 1/2–1 in, dark with orange-red marks along the edge of a flat body; long cone-shaped head. | Wash with soap and water. Seek care for allergic signs; people with severe reactions may be prescribed an epinephrine kit. Call 1-800-222-1222. |
| Giant desert centipede | Long, flat, segmented, one pair of legs per segment; up to 6–8 in. Often orange or red with a dark head and tail. | Most bites can be handled at home: clean the bite. If pain is severe or lasts more than 12 hours, seek care. Call 1-800-222-1222. |
| Tarantula hawk wasp | Large (to 2 in) blue-black wasp with bright orange wings; seen on milkweed and mesquite flowers in summer. | Clean the sting, cool compress; seek care for allergic signs. Call 1-800-222-1222. |
| Sonoran Desert toad (Colorado River toad) | Very large toad (to 7 in), smooth olive skin, big kidney-shaped glands behind the eyes and white warts at the corners of the mouth. | Dog exposure: rinse the mouth sideways with a hose (nose pointed down so it doesn't swallow), wipe the gums, and go to a vet immediately. Human exposure: wash skin, rinse eyes, call 1-800-222-1222. |
| Mountain lion (cougar) | Large tawny cat, long thick tail with a dark tip; tracks show four toes and no claw marks. | Don't run. Pick up small children, face the lion, look big, back away slowly, and shout. If attacked, fight back hard (rocks, sticks, fists). Report to AZGFD; call 911 for injuries. |
| Black bear | Black, brown, or cinnamon (color doesn't tell the species); no shoulder hump; tall ears. Grizzlies do not live in Arizona. | Never feed bears; store food and trash in your car or bear boxes. If you meet one, give it space, stand tall, make noise, back away; don't run. Fight back if a black bear attacks. Report to AZGFD. |
| Javelina (collared peccary) | Pig-like, grizzled gray-black with a pale "collar"; travels in herds; strong musky smell. Not a pig (a separate family). | Give them an escape route; keep dogs leashed. Never feed them (feeding wildlife other than birds and tree squirrels is illegal in Maricopa County, A.R.S. 13-2927). Clean bites well and seek care (infection, rabies risk). |
| Coyote | Gray-tan dog-like animal, bushy tail held low, large pointed ears. | Haze them: make noise, wave arms, throw objects near (not at) them. Keep pets inside at night. Any bite: wash 15 minutes with soap and water and get medical care for rabies shots. |