We visited Pucusana in order to see Blackish Oystercatcher for Wader Quest which we were fortunate enough to do, but by far and away the most common bird at the small fishing port was Inca Tern. This is simply an astounding looking bird and one that we really were looking forward to seeing. We had no idea they were so common and easy to see!
http://www.rick-simpson.com/2013/06/seabirds-at-pucusana.html
http://www.rick-simpson.com/2013/06/seabirds-at-pucusana.html