The term 'bird baby' can be broken down into two crossword solutions: STORK (5 letters) and EAGLET (6 letters). A STORK is a large wading bird with long legs and a long neck, typically white or grey in colour. They are found in many parts of the world and are known for their migratory habits. An eaglet is the young of an eagle, which is a large bird of prey with a powerful beak and talons. Eaglets are usually brown in colour and have a distinctive white head and tail. Both storks and eagles are known to build nests and lay eggs, making them both suitable answers for the term 'bird baby'.