The Museum of Science is accredited by the AZA and houses 50+ species, most of which are in the Live Animal Center. There's a lot of North American wildlife like North American porcupines and northern red-bellied cooters but they also participate in the species survival plan for cotton-top tamarins. The Calvert Marine Museum has mostly wildlife native to the Chesapeake Bay region and the river estuaries, including chain dogfish, river otters, and native turtles like terrapins. I don't know how many species are kept off the top of my head but by space the Estuarine Biology Gallery and otter habitat take up about 1/3 of the total space at the facility. The National Museum of Natural History has a reef display in the Sant Ocean Hall, as well as a butterfly pavilion and the O. Orkin Insect Zoo, which is the oldest continuously operating insect zoo in the US.