Piotr Naskrecki / Pitcher Plant (Nepenthes mirabilis) pitcher, Papua New Guinea

Eric Baccega / Purple pitcher plant (Sarracenia purpurea) in flower, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Eric Baccega / Purple pitcher plant (Sarracenia purpurea) close up of flower, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Scott Leslie / Purple Pitcher Plant (Sarracenia purpurea) without flowers in The Tablelands region, Gros Morne National Park, Newfound land, Canada

Scott Leslie / Purple Pitcher Plant (Sarracenia purpurea) in tablelands, Gros Morne National Park, Newfoundland, Canada

Albert Lleal / Purple Pitcher Plant (Sarracenia purpurea) trap detail, native to Canada and the United States

Albert Lleal / Purple Pitcher Plant (Sarracenia purpurea) with captured prey, native to Canada and the United States

Michael Durham / Venosa Pitcher Plant (Sarracenia purpurea venosa) with ants on edge of pitcher, an insectivorous plant native to swampy bogs of the southeastern US