Possible Clues:

• I am able to fish this with one large mouthful
• Its beak holds more than its belly can
• At last I might be able to make a mouthful for it
• Water bird in place abroad
• Piscivorous flier
• Bird, thin with wings obscured, probing nut
• One's often landed with a large fishing bill
• Bird, whose 'beak can hold more than his belly can'
• Big beaked bird
• One often landed with large bill