The crossword solution for the term 'colourful diving bird' is KINGFISHER. Kingfishers are a group of small to medium-sized, brightly coloured birds in the family Alcedinidae. They have a distinctive appearance with a long bill, short legs and a large head. They are found in most parts of the world, except for the polar regions. Kingfishers are known for their spectacular dives into water to catch fish, which they then eat. They are also known for their bright colours, which range from blues and greens to reds and oranges.