Sperm Whale Birth filmed off Dominica shows rare cooperative delivery and shifting coda vocal styles
sperm whale birth was documented off the coast of Dominica during a rare, closely observed event involving a well-known social unit. Researchers captured the delivery using underwater audio, aerial drone video, shipboard photography, and behavioral observations spanning before, during, and after the birth. The scientific account describes a collaborative effort in which multiple whales helped lift the newborn out of the water, alongside measurable changes in the group’s coda vocal styles tied to key moments.
What researchers documented in the birth event
The observation took place within a well-documented social unit identified as “Unit A. ” The record states that all 11 members of Unit A were present and participated as the calf was delivered. The birth lasted 34 minutes, measured from the moment the flukes emerged until the completion of delivery.
One of the central behaviors described was cooperative lifting: whales in the unit collaboratively lifted the newborn out of the water. The research team compiled a detailed timeline using concurrent methods—underwater audio recordings, aerial drone video, and shipboard photography—supported by direct behavioral observations collected before, during, and after the event.
The study emphasizes how unusual such documentation is in the wild. It notes that wild cetacean birth observations are extremely rare, with recorded observations in less than 10% of cetacean species. The account further states that, in the last 60 years, only one previous scientific observation of a sperm whale birth has been documented, with four additional published accounts describing observations just following births recorded during whaling activities.
Sperm Whale Birth reveals coda shifts during key events
Beyond the visuals of the delivery, the team recorded extensive vocalizations from the unit. The research reports statistically significant shifts in coda vocal style that corresponded to key events—specifically the beginning of the birth and interactions with short-finned pilot whales (Globicephala macrorhynchus) shortly after the birth event.
The scientific write-up frames these vocal changes as tightly linked to the timeline of events captured across the different observation methods. By pairing underwater audio with drone footage and photography, the researchers were able to align what the whales were doing at the surface with identifiable changes in coda style at key moments in the sequence.
The same account also places the observed lifting behavior into a broader evolutionary frame. It describes an evolutionary analysis suggesting that newborns being lifted out of the water dates to before the most recent common ancestor of toothed and baleen whales, more than 36 million years ago. It adds that cooperative lifting of the newborn is noted, so far, only in members of Odontoceti (toothed whales).
Immediate reactions from the research team
David Gruber, Founder of the Cetacean Translation Initiative (CETI) and a biology professor at the City University of New York, described the scene as striking for what it showed about social care: “I think it’s very enlightening to see another species working with such coöperation and care for their group. ”
He added a blunt contrast about human behavior: “Meanwhile, we do horrible things to each other. So there’s something to learn from them. ”
On the day of the observation, the event itself unfolded unexpectedly during a research trip out of Dominica. A journalist who was on board the catamaran described the team’s reaction in the moment as visibly overwhelmed, recalling one scientist repeatedly exclaiming: “Oh, my God, ” followed by, “Oh, my God, oh, my God. ”
Quick context on why this matters
The Scientific Reports account states this is the most in-depth observation of a wild cetacean birth, and the most comprehensive observation of a sperm whale birth published. It also underscores a broader gap: understanding of labor, birth, postnatal, and neonatal behavior remains lacking for many cetacean species because these events are rarely observed and documented.
What’s next
The research team’s detailed, multi-method record sets a new reference point for how a wild sperm whale birth can be captured and analyzed when timing, tools, and conditions align. The immediate next developments will center on how the field uses these synchronized observations—audio, drone video, and photography—alongside behavioral tracking to deepen interpretation of the cooperative lifting behavior and the statistically significant coda shifts documented around the birth and the post-birth interaction with short-finned pilot whales.
