Chinstrap penguins often attack predator birds like the giant petrel or skua who eat their eggs and chicks. These chinstrap penguins are a little more tolerant of the presence of this smaller snowy sheathbill but still watchful.
<a href="//commons.wikimedia.org/wiki/User:GRDN711" title="User:GRDN711">Gordon Leggett</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>