The caterpillars of many butterfly species are easily reared to adults on fresh foliage of the correct food plant for each species. Keep the foliage in a bottle of water but make sure the neck of the bottle is stuffed with paper towel to stop the caterpillars drowning in the water. Easy species to start with are Orchard Swallowtails on citrus or Wanderers on milkweed foliage. Once the caterpillar has pupated you can keep the pupa in a safe place until the adult butterfly emerges. Be aware that sometimes you might end up with a fly or wasp parasite emerging instead!
Wanderer butterfly caterpillar, Danaus plexippus
Newly emerged Common grass yellow
butterfly, Eurema hecabe
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