Mildred Dunnock of roles in Broadway productions during the 1930s, Dunnock won praise for her performance as a Welsh school teacher in "The Corn is Green" in 1940. The 1945 film version marked her screen debut. During the 1940s she performed mainly on stage, in such dramas as "Another Part of the Forest" (1946) and "Death of a Salesman" (1949) and in the musical "Lute Song" (1946). In 1947, Dunnock became a founding member of the Actors Studio. Dunnock reprised her "Salesman" role in the 1951 film version. She originated the role of Big Mama in the Tennessee Williams' "Cat on a
Bird nest called caliology. Bird nests are also built by humans to help in the conservation of certain birds (such as swallows). Swallow nests are generally built with plaster, wood, terracotta or stucco. Artificial nests, such as nest boxes, are an important conservation tool for many species, however nest box programmes rarely compare their effectiveness with individuals not using nest boxes. Red-footed falcons using nest boxes in heavily managed landscapes produced fewer fledglings than those nesting in natural nests, but also than pairs nesting in nest boxes in more natural habitats. Bird nest A bird nest is the spot in which a