Executive Order 11988: Floodplain Management - an order given by President Carter in 1977 to avoid the adverse impacts associated with the occupancy and modification of floodplains.
Executive Order 11990: Protection of Wetlands - an order given by President Carter in 1977 to avoid the adverse impacts associated with the destruction or modification of wetlands.
Executive Order 12630: Government Actions and Interference with Constitutionally Protected Property Rights - an order given by President Reagan in 1988 directing the agencies to carefully evaluate the effect of their administrative, regulatory, and legislative actions on constitutionally protected property rights.
Executive Order 12962: Recreational Fisheries - an order given by President Clinton in 1995 to conserve, restore, and enhance aquatic systems in order to provide for increased recreational fishing opportunities nationwide.
Executive Order 13186: Responsibilities of Federal Agencies to Protect Migratory Birds (PDF) (4 pp, 38.6K, About PDF) - an order given by President Clinton in 2001 directs executive departments and agencies to take certain actions to further implement the Migratory Bird Treaty Act.