When a male Adélie penguin has his eye on a particular female, he searches for the right pebble. Upon discovery, he waddles back to the colony and presents it to the eye of his beholder.

The first bird census of the Danger Islands unearthed over 750,000 Adelie breeding pairs ... Evidence of the previously-unknown penguin colony first emerged in data from the Landsat Earth ...

Experts think this could have been caused by too much ice near the penguin colony. In order to collect the data, seabird experts at the Australian Antarctic Division monitored a 100km stretch of ...