Chick aggression back to chicks 2 adults + 4 chicks on beach in signed area. 2 adults + 4 chicks on beach in signed area. 18:33:32 - Adult 1 leads chicks east toward eastern sign. Adults are in front of chicks as they move east. Adults then run into 3rd adult 18:33:32 - Adult 1 leads chicks east toward eastern sign. Adults are in front of chicks as they move east. Adults then run into 3rd adult 18:35:27 - Three chicks hide, 1 remains with adults. Parent 1 watches over chick as parent 2 18:35:27 - Three chicks hide, 1 remains with adults. Parent 1 watches over chick as parent 2 18:35:33 - Interloper flies at adult 1 and chick. 18:35:33 - Interloper flies at adult 1 and chick. 18:35:33 - parent 2 takes flight to try and lead interloper away from chick. 18:35:33 - parent 2 takes flight to try and lead interloper away from chick. 18:35:33 - interloper ignores parent 2s leading and attacks parent 1 forcing it away from 18:35:33 - interloper ignores parent 2s leading and attacks parent 1 forcing it away from 18:35:35 Chick runs, interloper flies at chick attacking it with beak open (seemingly trying to bite it). 18:35:35 Chick runs, interloper flies at chick attacking it with beak open (seemingly trying to bite it). 18:35:45 Adult 1 recovers and attacks interloper aggressively in mid air. 18:35:45 Adult 1 recovers and attacks interloper aggressively in mid air. 18:35:47 Birds land momentarily, adult 1 performs broken wing display. 18:35:47 Birds land momentarily, adult 1 performs broken wing display. 18:35:47 Interloper attacks parent 1 again as chick runs west away from combat. 18:35:47 Interloper attacks parent 1 again as chick runs west away from combat. 18:35:49 Adult 1 and interloper land again before another aerial attack from interloper biting wing 18:35:49 Adult 1 and interloper land again before another aerial attack from interloper biting wing 18:35:49 Parent 1 responds biting hind quarters of interloper, chick crouches and hides approximately 18:35:49 Parent 1 responds biting hind quarters of interloper, chick crouches and hides approximately 18:35:54 Parent 2 flies back to aid parent 1, interloper and parent 1 are bowing aggressively with wings out. 18:35:54 Parent 2 flies back to aid parent 1, interloper and parent 1 are bowing aggressively with wings out. 18:35:54 - parent 2 lands and joins attack on interloper. 18:35:54 - parent 2 lands and joins attack on interloper. 18:35:55 Both parents attack interloper, one charging along ground and the other flying at 18:35:55 Both parents attack interloper, one charging along ground and the other flying at 18:35:56 Parents continue to attack interloper, charging it and bowing. 18:35:56 Parents continue to attack interloper, charging it and bowing. 18:35:58 Birds continue to bowing aggressively at interloper. 18:35:58 Birds continue to bowing aggressively at interloper. 18:36:10 Interloper begins to retreat. 18:36:10 Interloper begins to retreat. 18:36:17 Parents begin heading back toward chicks, leaving interloper, then fly past chick\18:36:17 Parents begin heading back toward chicks, leaving interloper, then fly past chick\ 18:36:28 Parents take turns performing broken wing distraction displays in front of observers as 18:36:28 Parents take turns performing broken wing distraction displays in front of observers as 18:37:49 Parents fly to retrieve chicks which are east of them at this point. Interloper has remained 18:37:49 Parents fly to retrieve chicks which are east of them at this point. Interloper has remained