It's Freddy the Seb-Swaddling Guzzler. D was very interested to hear that Freddy likes eating fish heads because he got to try one on his visit to Noma last year (as well as some other weird and wonderful foods - you can read more about it here).
Here's the official bio:
Name and Species: Freddy the Seb-Swaddling Guzzler
Personality: Protective, boisterous, devoted.
Seb-Swaddling Guzzlers are meant to deliver the mail, but they can’t fit many letters in their bulging beaks because they are always finding strange little critters called Sebs to take care of. If you spot a Guzzler without a Seb in its beak, look under its cap and you’re sure to find one snuggling underneath.
Habitat: Seb-Swaddling Guzzlers live on the cliffs of the TakiTaki Islands but they often release their Sebs on Clickenham Green.
Likes: Fish heads and sand sculptures.
Dislikes: Ghost pirates and disposable diapers.