In the series below of actual and prospective assisted migration projects, all but one (Florida torreya tree) are being advocated and implemented by professional scientists, and usually with oversight by governmental endangered species programs. Taxonomic significance in successfully translocating plant and animal species range from (a) maintaining the genetics of an isolated population (American pika), to (b) preventing extinction of a subspecies (Quino checkerspot butterfly), to (c) preventing the extinction of a species (Florida torreya tree), and to (d) preventing extinction of a genus (Western swamp tortoise).
