A few have already been spotted in Los Cabos, but dozens of male whales are arriving to the San Ignacio and Ojo de Liebre lagoons shallow waters, in sort of an “advance” before female whales arrive to give birth to their calves. This is their annual migratory route to their winter calving grounds in the warmer tropical waters of the Pacific. They return North in the spring. Humpback whales migrate around 5,000km (over 3,000 miles) on average, one of the longest migratory journeys of any mammal on Earth.