There are around eighteen penguin species, and once you know the tell-tale marks they are surprisingly easy to tell apart. Here is a field guide to the family, from the giants of the ice to the smallest of the bunch.
The giants
The Emperor penguin is the tallest and heaviest, breeding on Antarctic sea ice and famous for the male's months-long egg vigil. The King penguin is the second largest, with vivid orange patches on the neck and a sleeker profile — the one most people picture in a glossy wildlife photo.
The classic tuxedos
The Adélie is the archetypal black-and-white penguin, all business with a stark white eye-ring. The Gentoo is the speedster of the group, recognisable by the white stripe arcing over its head like a bonnet. The Chinstrap wears a thin black line under its chin, as if it forgot to shave.
The characters
The Rockhopper sports a spiky yellow crest and a permanently unimpressed expression. The Macaroni looks similar but with a denser, orange-yellow crest. The Little Blue (or fairy penguin) is the smallest of all, standing barely 30cm tall in a slate-blue coat.
The regional specialists
The Magellanic and Humboldt patrol the coasts of South America. The African penguin — sometimes called the jackass penguin for its braying call — nests on boulder beaches near Cape Town. The Yellow-eyed and Fiordland penguins are rarer, shyer and tied to New Zealand.
Why it matters for gift-giving
Knowing the species helps you pick the right wall art or figurine — a wildlife fan will notice whether that print is an Emperor or a Gentoo. And a penguin book makes a great next step for anyone who just discovered they have a favourite species.