Orcas here have an unusual way of hunting, striking onto the beach to snatch the pups in the shallow surf. It’s a technique that takes years to learn, but they only have a short season to hunt onshore, between March and April – early autumn in the Southern Hemisphere – while the sea-lion pups are learning to swim.
There are a huge number of variables the orcas take into consideration in making each strike – the direction of the wind and its strength, the tides, the time of day, the current position of the sea lion colonies on the beach. There are different sea lion colonies dotted all along the northern beaches of Peninsula Valdes, and the orcas have several different options for where they chose to stage an attack.
Video: Barcroft TV https://www.youtube.com/watch?v=AtF3FPyRVIw