This survey paper examines various information insufficiencies in biodiversity conservation and their impact of regulatory choices. We surveyed the literature in the field and identified four major types of informational insufficiencies in making efficient biodiversity conservation decisions: 1) biological uncertainty 2) natural uncertainty 3) individual information, and 4) monitoring problem. The consequences of these four types of information insufficiencies on the choice of regulatory tools are explored. We discuss in this context three types of regulatory tools: land takings, environmental fees/charges, and contracts. The efficiency of each type of regulatory tools is shown dependent on the specific informational constraints that the regulatory faces.