Emperor penguins construct their nests in the form of "huddles," which are tightly packed groups of individuals huddling together for warmth and protection from the extreme Antarctic weather. These huddles can vary in size from a few dozen to several thousand penguins.
Within the huddles, emperor penguins create individual nests using snow and ice. They scrape out a shallow depression in the snow and line it with feathers, forming a crude but effective nest to hold their eggs. The nests are typically 10 to 12 inches in diameter and just a few inches deep.
It's important to note that emperor penguins are the only penguin species that lay their eggs during winter. Most other penguin species breed during the warmer summer months.