- His mission and flag, along with his accent, indicate that Uncle Nigel is probably British.
- This would mean British spies, such as MI6 (or its animal spy division, anyway) are also searching for The Red Squirrel.
- Uncle Nigel's design might be based off a real penguin breed called royal penguins.
- Uncle Nigel is the second new penguin character introduced to the series, the first being Buck Rockgut.
- Nigel's surname may be Tux.
- Private calls Nigel his uncle, but they are of different species of penguins. Both are British, however.
- Nigel could have adopted Private at an early age as his uncle or he may have been close friends with Private's father/mother or perhaps, Private's father or mother was a royal penguin & Nigel was their brother while the other was Private's species (probably emperor penguin).
- Private and Nigel may have separated when Private moved to the Southern USA (implied Texas) to become Mr. Tux and Nigel stayed behind to continue his spy work.
- Nigel thinks Private's obsession with Lunacorns is an act.
- Nigel spent 47 years under cover, hoping to track down Red.
- Red informs the Penguins that Nigel is "The Worlds Greatest Penguin Agent".
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