Why Penguins Sometimes Raise Someone Else’s Baby and What It Reveals About Their Secret Social World

Did you know that penguins are perceived as devoted parents who take turns feeding and caring for their own chicks? However, recent studies indicate that there is more to their social behavior than one might think.

In recent times, scientists have made a number of discoveries indicating that adults of certain penguin species feed and take care of chicks that are not their own. Such behavior has been referred to as allofeeding. It has also been perceived that this is not a unique case of penguin parenting but a survival mechanism of a community of penguins.


According to BBC News, scientists made a number of discoveries indicating that such cross-parental behavior is exhibited by king penguins and chinstrap penguins. In these two species of penguins, chicks are often found in large groups referred to as crèches.

Evidence from king penguin colonies

One of the strongest pieces of evidence comes from studies on king penguins within the Antarctic regions, where researchers were able to track non-breeding adults within their colonies.

According to research on this topic, as mentioned by Wikipedia’s entry on Allofeeding, approximately 22 percent of non-breeding adults were found to be feeding almost 65 percent of chicks within their crèches. The importance of this contribution cannot be denied, as it indicates that a significant number of individuals are able to make a considerable contribution towards the survival of chicks not their own.

Chinstrap penguins have a similar, although slightly different, form of allofeeding that is equally interesting. During the chick-guarding stage, the chicks communicate their need for food by pecking the side of the adult female’s bill. In turn, this causes the adult female to regurgitate food, even if the chick is not hers.

According to The Auk, this behavior demonstrates that the feeding is not random, although it is actually governed by certain criteria.

Also, penguin colonies thrive in some of the most extreme environments on the planet, but it appears that cooperation plays a significant part in their survival. Scientific studies published on ScienceDirect highlight the importance of cooperative feeding and care, helping to mitigate the effects of extreme temperatures, predation, and inconsistent food availability.

Balancing care and self-preservation

Not all penguins are equal when it comes to their dependence on group care, and some have been observed to have a balance between group care and their individual survival.

Scientific studies on Adélie penguins in the Ross Sea, as featured in various journals from Springer, have established that adults adjust their feeding habits according to their physical condition and food availability.

This implies that penguins are assisting chicks not related to them but not at their own expense, meaning that penguins have made a calculated decision on how to allocate their energy, implying a sophisticated understanding of their environment.

The discovery of allofeeding and cooperative brooding behavior among penguins also contributes to the ever-increasing body of research that indicates that animal societies are more complex than initially perceived.

This indicates that survival does not always have to be a function of intense competition but also of cooperation and mutual assistance.