Earth Witness Community - Celebrates the existence of and bears witness to species and natural places on the Earth that no longer exist in their natural state.
Hawaii's Extinct Species - Lists many of the birds, snails, insects, and plants to have met their demise though human intervention and pervasive alien introductions.
Historical-Era Extinctions - Looks at how escalating human populations and their capacity to modify their surroundings are a significant influence on modern rates of extinction and endangerment.
