Science1 publisher3 min readPublished
A humpback mother stayed beside her stillborn calf for hours off Australia's Gold Coast
Griffith University researchers have published the first documented case of a humpback whale attending her dead newborn. It is one opportunistic sighting, and it is a record of what the species does; what the mother felt stays an open question.
The Scientist · Science desk
What happened
- In 2025, researchers recorded a female humpback whale off Australia's southern Gold Coast accompanied by an escort whale after she apparently gave birth to a deceased calf.
- The mother was seen staying near the calf for several hours, and the researchers say she may have remained with it for days.
- The case report by Jan-Olaf Meynecke and Andrew Mulville has been published in Discover Animals as the first documentation of humpback post-mortem attendance of a stillborn.
- Meynecke said attentive behavior toward dead individuals has been recorded mainly in toothed whales and delphinids, with far fewer published accounts involving baleen whales such as humpbacks.
Compiled by The ScientistSomething wrong?How this is made
Why it matters
- constraint With only a handful of baleen whale cases on record, the unit of analysis is still the individual animal, so nothing here supports a statement about what humpback mothers typically do after a stillbirth.
- contradiction Griffith University's release is headlined around a mother who may have mourned, while the paper's own title claims only post-mortem attendance. Anyone citing the case has to decide which of the two they are citing.
- precedent Meynecke's call for systematic documentation of neonatal mortality events puts the data collection on rescue and whale-watch crews, since they are usually the only people on the water when a newborn dies.
The release puts the mother beside the calf for several hours and raises days as a possibility [2]. The several hours were observed; the days are an inference. Olaf Meynecke, of Griffith University's Whales and Climate Research Program, kept the same uncertainty in his own description. "She remained close to the calf, maintaining eye contact and positioning herself next to her calf over several hours and maybe even days," he said [7].
Where the behavior happened may matter more than how long it lasted. Meynecke said: "Unlike reports of toothed whales where mothers have been observed lifting their dead calves to the surface, this humpback whale mother showed prolonged post-mortem behavior and attention towards her deceased calf under the surface" [6]. A mother raising a dead calf into the air is a visible event from a boat, and a mother holding station beside one below the surface is not. That is roughly what Andrew Mulville, the Sea World Foundation rescue boat captain who witnessed the encounter, described seeing first: "At first sight, I thought it was just two whales resting on the surface, but their behavior was unusual" [9][10]. Part of the imbalance between toothed whale records and baleen whale records could be an imbalance in what surface observers are able to notice.
Meynecke's reading of the behavior is that it was "consistent with care-giving or nurturing actions and post-mortem attentive responses documented in socially complex mammals, and indicated an inherent, strong maternal attachment to the calf" [8]. That compares behavior to behavior. Whether the mother recognized the calf as dead is a different question, and a single sighting cannot separate the two. Maternal care that simply continues after a newborn stops responding would look, from the surface, much like care directed at a calf known to be dead. The authors frame the question the same way, saying documentation is needed to determine whether such behavior reflects maternal attachment, grief-like responses, or other social and emotional behavior [15]. The calf is described as a presumed stillborn, and the release does not report a cause of death [18].
This is a case report in the literal sense: one event, seen from a rescue boat, written up with the person who saw it as co-author [19]. The sighting was in 2025 and the paper appeared in 2026, about a year later [17]. Mulville said: "When I actually worked out what was happening, I was totally surprised" [11].
What is missing is a denominator: how many humpback stillbirths are observed at all, and in how many of them the mother stays. The paper asks for that kind of record. "This case study highlights the need for continued systematic documentation of rare neonatal mortality events to better understand the cognitive, emotional, and evolutionary significance of post-mortem behavior in large whales," Meynecke said [12].
What to watch
- Whether further east Australian sightings of neonatal mortality are logged in a shared, countable record, as Meynecke asks for.
- Whether a follow-up case pairs the behavioral observation with a necropsy, photo-ID of the mother, or drone or tag data on duration.
- Whether other cetacean researchers dispute the stillbirth interpretation or the care-giving reading in the Discover Animals paper.