Here is a possible summary:
The text is about the interactions between orcas and whales, and how they have evolved over time. The text describes various examples of orcas hunting, attacking, or cooperating with whales, and how whales defend themselves or help other animals from orcas. The text also explains some of the theories and evidence that scientists have about the origins and motivations of these behaviors. The text concludes by highlighting the threats that orcas face from human activities and pollution, and urges the reader to care about their conservation.
Here are the key facts extracted from the text:
1. On March 21, 2019, scientists observed orcas attacking an adult blue whale.
2. The blue whale was approximately 18-22 meters in length.
3. The orcas' attack was organized and ferocious, resulting in the blue whale's death within an hour.
4. About 50 orcas feasted on the whale after its death.
5. Orcas had previously killed a blue whale calf in 2019 and a young blue whale in 2021.
6. Adult blue whales are challenging prey due to their size and strength.
7. Orcas must work together to successfully hunt an adult blue whale.
8. The attack in March 2019 involved at least 12 orcas, led by eight adult females and one male.
9. Female orcas are considered more forceful and aggressive predators than males.
10. Female orcas may be more prone to attacks due to the need to feed their young.
11. Orcas use specific techniques during attacks, such as biting fins and pushing prey underwater.
12. Humpback whales have been observed using tactics to protect their calves from orcas.
Please let me know if you need more details on any of these points.