Assistant Professor of Art Elijah Huge and 11 of his students have designed four proposals for a bird-viewing observatory for a 700-acre nature preserve in Southbury, Conn., and plan to build one by the end of April. It is the third major design-build project for North Studio, the faculty-student design collaborative Huge established in 2006. The students are all members of his Architecture II class. Previous North Studio projects have included a bird-viewing platform for an Audubon Society sanctuary in Portland, Conn., and a Sukkah, or temporary Jewish ritual structure, at Wesleyan. Audubon wildlife sanctuary Bent of the River is…