Covering the major elements of the statute, regulations, and case law, this updated edition of the practice-focused Endangered Species Act Essentials is a useful, quick reference and a valuable starting point for further research. Whether handling your first ESA matter or an experienced practitioner, ESA Essentials: Endangered Species Act's organization and presentation of the essentials helps locate the fundamental information for quick answers and directing further inquiry. From species listing and critical habitat designation basics to the intricacies of interagency consultation and biological opinions, the essentials are set out in clear fashion with discussion of the key case law decisions, agency guidance, and other considerations. The book covers the now fifty-plus years of ESA implementation.