When it comes to bird numbers on the Hamden Slough, shorebirds are second only to waterfowl. Up to 1000 shorebirds at one time have been observed using the refuge’s managed wetlands. Although migration boasts greater than 20 species, only the marbled godwit, killdeer, and greater yellowlegs breed on the refuge. The marbled godwit, a Regional Bird of Conservation Concern, uses wet prairies, grasslands, and marshes for breeding and nesting. These habitats are plentiful on Hamden Slough. During spring, it is likely visitors will hear the call of a godwit pair and see them flying low over the drained Hamden Lake.