The Rattlesnake has
The deadliest venom of pit viper family in the us.
If bitten stay calm. Identify snake if possible. Don't cut skin, use ice or apply tight tourniquet. Can use venom extractor within 5 min (but it's effectiveness has been questioned). Don't run – walk / be carried to a vehicle. Call 911. Have someone at scene transport you to er. Can clean wound w soap & water. Antivenin is available at many er's.