Conium maculatum disturbed ground. It is used as a food plant by the larvae of some Lepidoptera species, including silver-ground carpet. The poison hemlock moth ("Agonopterix alstroemeriana") feeds on the plant during its larval stage. "A. alstroemeriana" has been widely used as a biological control agent for "C. maculatum". Poison hemlock flourishes in the spring, when most other forage is gone. All plant parts are poisonous, but once the plant is dried, the poison is greatly reduced, although not gone completely. The plant is poisonous to animals that graze on it. "Conium" contains the piperidine alkaloids coniine, N-methylconiine, conhydrine, pseudoconhydrine and gamma-coniceine
Rockstone poison dart frog Rockstone poison dart frog The Rockstone poison dart frog ("Dendrobates nubeculosus") is a poorly known species of dendrobatid frogs endemic to Guyana. As it is known from only one specimen, very little information is currently available on "D. nubeculosus". It has been suggested to be one of the most poorly known species in the world. "D. nubeculosus" is a small to medium-sized poison dart frog; larger than many of its contemporary "Ranitomeya" species, but smaller than the other members of the genus "Dendrobates". The holotype specimen measures 2.5 centimetres in length, and the species' size range is unknown. It is