The survival rate of castor bean ingestion is 98%. Feedstocks can be a variety of sunflower oil, soybean oil, or castor bean oil. Jonathan was found hanging by a rope from a castor bean tree. A deadly poison, ricin, comes from seeds of the castor bean. The subspecies "S. cynthia ricini" feeds upon castor bean. Ixodes ricinus, the castor bean tick, is a chiefly European species of hard-bodied tick. Principal oilseeds were sesame or til ("Sesamum indicum"), mustard, castor bean, safflower and linseed. Its seed is the castor bean, which, despite its name, is not a true bean.