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Where do we waddle?
Summer's ending here, and days are getting shorter. In response to changing daylength, royalty like us (Aptenodytes forsteri) will soon begin a long march to our nesting colonies. There, males will huddle together for warmth, incubating eggs atop their feet until the eggs hatch in June, in the middle of our winter. Looking for clues? Less than half of the Mystery Classes are located in the same hemisphere where we are. Using photoperiod data, can you figure out which ones?

Penguin
Photo: I. DuffyWikipedia Commons