Out of all the blue whale sightings worldwide, mother-calf pairs make up just 3.1 percent. This doesn’t make sense; though blue whales are far rarer today than they were before the rise of ...

But across various blue whale populations, high pregnancy rates of 33–50% annually seem to contradict the average 3.1% rate of sightings of blue whales involving mother-calf pairs. When compared ...

Blue whale births remain unseen because they occur in winter, when researchers typically aren't observing them. By the time ...

But across various blue whale populations, high pregnancy rates of 33-50% annually seem to contradict the average 3.1% rate of sightings of blue whales involving mother-calf pairs.

Given pregnancy rates as high as 33-50 per cent for the species, it is a mystery that the rate of sightings of blue whale mother-calf pairs is on average an abysmal 3.1 per cent. Researchers ...

A blue whale mother and calf are swimming together in the Gulf of California in Baja, Mexico, one of the warm-water places blue whales spend their winter months. Only two blue whale births have ...

A blue whale mother and calf swimming together in the South Taranaki Bight, New Zealand, a rare summer feeding region with many mother-calf pairs.