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 ...

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

Where are all the baby blue whales? Scientists may have finally cracked the mystery - Blue whale calves are rarely seen with ...

The endangered whales visit Bay each year, where researchers count and track them, hoping the species returns from the brink ...

“This new idea provides an alternative explanation for why some blue whale populations appear to produce very few calves,” Branch said. “It’s not a failure of calf production, it’s ...

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 new study by Trevor Branch, a professor in the School of Aquatic and Fishery Sciences, suggests a hypothesis to explain why ...

A newborn Southern Resident killer whale calf with distinctive peachy coloring captured attention as it bonded with its family, not long after a tragic loss surfaced when a grieving mother was seen ...

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.

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.