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b'Killer whales have been making the news lately for attcking boats. This is particularly notable because they seem to have spread this trend to other orcas. But orcas have been demonstrating a few interesting difficult-to-explain trends since people have started paying attention. We describe what orcas have been doing, why it\'s interesting, and what we understand about it so far.

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1. https://www.sciencefocus.com/science/head-to-head-orca-vs-great-white-shark/
2. https://movementecologyjournal.biomedcentral.com/articles/10.1186/s40462-017-0094-0
3. https://hswri.org/?gclid=Cj0KCQjwwISlBhD6ARIsAESAmp6Xvm1Z5XmAWbDCOnUdY9qRS7avBr1P09Pv1WpWyAfRdh-v7iynXNQaAldDEALw_wcB
4. https://cascadiaresearch.org/user_page/foraging-behavior-and-ecology-transient-killer-whales-orcinus-orca/
5. https://www.whaleresearch.com/orca-behaviors
6. https://www.killer-whale.org/killer-whale-social-structure/
7. https://www.atlasobscura.com/articles/killer-whale-orca-trends
8. https://www.discovermagazine.com/planet-earth/attacking-boats-may-be-a-new-social-trend-for-juvenile-orcas
9. https://www.smithsonianmag.com/science-nature/understanding-orca-culture-12494696/
10. https://www.iflscience.com/in-1987-orcas-had-a-fashion-of-wearing-a-dead-salmon-as-a-hat-69542
11. https://www.livescience.com/animals/orcas/orcas-have-sunk-3-boats-in-europe-and-appear-to-be-teaching-others-to-do-the-same-but-why
12. https://a-z-animals.com/blog/discover-why-scientists-believe-killer-whales-are-attacking-boats-on-purpose/
13. https://link.springer.com/article/10.1007/s40617-022-00719-3
14. https://us.whales.org/whales-dolphins/species-guide/?gclid=Cj0KCQjwwISlBhD6ARIsAESAmp7EGWXdAAMLFOpMbJBFfR8KH0hO8JeTwc4Hymd-MxeVfLLwOHRwbaAaAiWhEALw_wcB
15. https://www.wwf.org.uk/learn/fascinating-facts/orcas
16. https://seaworld.org/animals/facts/mammals/killer-whale/
17. https://www.science.org/content/article/seaworld-stops-breeding-orcas-what-are-impacts-research
18. https://www.smithsonianmag.com/science-nature/from-ramming-boats-to-hunting-great-white-sharks-five-astounding-orca-behaviors-180982510/
19. https://www.cbs8.com/article/news/local/video-shows-pod-of-30-killer-whales-playing/509-32c1c223-e1b4-4469-864d-336ed5140984