Digital Morphology, part of the National Science Foundation Digital Libraries Initiative, develops and serves unique 2D and 3D visualizations of the internal and external structure of living and extinct vertebrates, and a growing number of 'invertebrates'. The Digital Morphology library contains nearly a terabyte of imagery of natural history specimens that are important to education and central to ongoing cutting-edge research efforts. The Digital Morphology library site now serves imagery, optimized for Web delivery, for almost 300 specimens contributed by more than 80 collaborating researchers from the world's premiere natural history museums and universities.