The term 'Bird with an S-shaped neck' can be summarized by two crossword solutions: HERON and EGRET. Herons are a type of wading bird that have long legs, a long neck, and a pointed bill. They are typically found near bodies of water such as lakes, rivers, and wetlands. Egrets are also a type of wading bird that have long legs, a long neck, and a pointed bill. They are usually white in color and can be found in wetlands, marshes, and other shallow water habitats.