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The photographs show unusual interspecies care, but they do not reveal how the goldeneye joined the family or what happened to it later. The identification was considered likely rather than absolutely certain: a very young Barrow’s Goldeneye could not be completely ruled out.
What happened at Paul Lake
Canadian photographer Doug Giles made the observation in June 2016 at Paul Lake Provincial Park, British Columbia. He was photographing a Common Loon pair with their downy young when one chick stood out. Its plumage was browner than the loon chicks, its cheeks were pale, and its bill was shorter and rounder.
Giles sent the photographs to Walter Piper, identified by Audubon as lead scientist and founder of The Loon Project. Piper recognized the odd-looking youngster as a Common Goldeneye. He cautioned that a Barrow’s Goldeneye could not be entirely excluded at such a young age, when the two goldeneye species can be difficult to separate visually.
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The adults were not merely sharing the lake with the duckling. The images showed the loons tending it alongside their own young and offering it freshwater fish. That behavior is the core of the report: a loon family appeared to have incorporated a duckling from another species.
Audubon published the account on September 13, 2016. It describes a historical photographic observation, not a new sighting.
Why the adoption was such a big deal
Loons are not generally tolerant of every waterbird
Common Loons defend feeding and nesting areas and may compete with other waterfowl. Audubon’s account notes that loons can be aggressive toward other waterbirds, including ducklings. Piper explained that this behavior is best understood as a survival response: Mallards close to shore can attract predators that also threaten loon chicks. In that setting, seeing loons protect and feed a foreign duckling is especially striking.
It crossed a species boundary
Piper had experience with Common Loons accepting unrelated orphaned loon chicks. Those cases still involve the same species. He had not seen the birds take in a chick belonging to another species before the Paul Lake report. The observation therefore expanded the unusual-care behavior from adoption within a species to apparent care across species lines.
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Parental readiness may have played a part
The account offers a biological explanation without presenting it as a proven cause. After mating, adult loons may be primed to respond to young. Piper put it this way: “After mating, loons are hormonally primed,” Piper says. That readiness could help explain why adults already caring for chicks responded to an unfamiliar youngster, but no observer witnessed the moment the goldeneye entered the family.
How could a goldeneye have ended up with loons?
No one recorded the duckling’s separation from its mother, so the route into the loon family remains unknown. Audubon presents a plausible scenario rather than a witnessed sequence: the young goldeneye may have become separated from its mother and brood, then encountered loons that were already tending young.
Common Goldeneyes raise larger broods than loons. Audubon’s report gives a typical summer total of 12 to 15 chicks for Common Goldeneyes. With many ducklings moving through a shared lake environment, a temporary separation is conceivable. The same account suggests that loon parents may not distinguish every individual chick, especially when several downy young are close together.
Those factors can make the adoption understandable without making it certain. The photographs establish that the duckling was with the loons and receiving care; they do not establish whether the adults deliberately rescued it, mistook it for a loon chick, or simply began responding to a young bird that stayed near them.
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What the photographs reveal about the chick
Field marks noted in the report
| Bird in the photographs | Visible or reported clues | Confidence and limits |
|---|---|---|
| Common Loon chicks | The downy young being tended by the adult pair | The adults were identified as Common Loons in the account |
| Probable Common Goldeneye | Brown appearance, pale cheeks and a shorter, rounder bill than the loon chicks | Piper’s identification was likely, not absolute |
| Barrow’s Goldeneye possibility | Very young goldeneyes can be difficult to distinguish between species | Not entirely ruled out at the age shown |
The safest description is therefore “a probable Common Goldeneye duckling.” Calling it definitively a Common Goldeneye would remove the age-related uncertainty Piper retained.
Why age matters for identification
Young goldeneyes do not yet show all of the features birders use to separate species confidently. The report specifically warns that Common and Barrow’s Goldeneyes can be hard to distinguish at this stage. A field observer can record the visible marks and a probable identification while preserving the alternative rather than forcing a certainty the photographs cannot support.
What did the loons feed it?
Giles photographed the duckling being offered freshwater fish by the loons. That detail is notable because Audubon describes goldeneye ducklings as able to dive and feed themselves from birth, with insects and crustaceans listed as their typical food. The images therefore show the loons applying their own feeding behavior to a youngster whose normal diet is described differently.
The difference does not prove that fish were nutritionally ideal for the duckling or that the loons changed its long-term diet. It shows only what was documented at the time: the adults presented fish and the duckling was part of the feeding interaction. Goldeneye ducklings are precocial, so they can find food soon after hatching, but they still benefit from adult guidance and protection from predators.
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What is known about the duckling’s fate?
The reported account does not say whether the goldeneye remained with the loons through the summer, survived to adulthood, rejoined its own species, or returned to Paul Lake in a later year. It also does not document whether living among loons altered the duckling’s imprinting or social behavior. Those outcomes were discussed as possibilities, not observations.
That gap matters. A photograph can document association and care at one point in time, but it cannot establish the duration or success of an adoption without follow-up observations. The Paul Lake report should therefore be treated as a remarkable snapshot rather than a complete life history.
Could the loons have mistaken the duckling for their own?
The account does not resolve what the adults perceived. Several explanations remain compatible with the evidence:
- Parental response: Adults already caring for young may have responded to the duckling’s size, movement or calls as they would to a chick in need.
- Brood confusion: A goldeneye from a larger brood could have joined the loon family while the adults did not distinguish its species.
- Protection first: The loons may have tolerated and guarded a solitary youngster without any deliberate recognition of an adoptive relationship.
These are interpretations of the circumstances described by Audubon. No observer saw the initial encounter, and the photographs cannot reveal the adults’ internal recognition of the duckling.
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How unusual is interspecies care among loons?
Unusual care is not the same as a routine behavior. Piper’s prior experience involved Common Loons accepting unrelated loon chicks, showing that adults can sometimes care for young that are not their own. The Paul Lake case was different because the youngster was from another species.
A later Loon Project post, published June 29, 2019, described a separate Common Loon pair caring for a Mallard duckling and referred back to the British Columbia goldeneye case. That later example provides context that interspecies associations have been observed more than once, but it does not supply follow-up information about the Paul Lake duckling. The two observations should not be merged into one event.
What this case does—and does not—prove
Supported by the 2016 report
- A Common Loon pair at Paul Lake Provincial Park was photographed tending a differently marked chick in June 2016.
- The chick was identified as probably a Common Goldeneye, with Barrow’s Goldeneye not completely excluded.
- The loons offered the duckling freshwater fish.
- The behavior was notable against the background of loon aggression toward some other waterbirds.
- Piper had seen loons accept unrelated loon chicks but had not previously seen them accept a chick from another species.
Not established by the report
- How the duckling became separated from its mother or brood.
- Whether the loons intentionally adopted it or simply tolerated and protected it.
- How long the association lasted.
- Whether the duckling survived, rejoined goldeneyes or reproduced.
- Whether its social or migratory behavior was changed by time with loons.
No peer-reviewed paper or formal study documenting the Paul Lake observation is cited in the account. It is best described as a reported photographic observation interpreted by a loon researcher, not as an independently confirmed experiment or long-term study.
How to interpret a similar sighting responsibly
Birders who encounter an apparently mixed brood can improve the record without disturbing the animals.
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- Keep distance. Use a long lens or binoculars and avoid approaching a nesting or feeding family.
- Record the place and date. A precise location such as a lake, park and province makes later verification possible.
- Photograph identifying features. Capture the bill shape, cheek color, body tone and size in relation to nearby chicks.
- Note behavior separately from interpretation. Write that adults offered fish or guarded a chick before labeling the relationship an adoption.
- Preserve uncertainty. If a young goldeneye could be Common or Barrow’s, report the probable identification and the alternative.
- Share with qualified reviewers. A regional bird-record committee, museum ornithologist or species specialist can assess images without turning a tentative field mark into a certainty.
A North American bird field guide can help with the visible differences between young goldeneyes, but the Paul Lake account itself does not endorse a particular guide. The most useful reference is one that explains age-related variation rather than presenting every juvenile as immediately identifiable.
Why the story still matters
The Paul Lake photographs matter because they capture a conflict between two expectations. Loons are capable of territorial aggression toward other waterbirds, yet these adults fed and protected a duckling that looked unlike their own young. The event also illustrates how parental behavior can operate under uncertainty: an adult may respond to a vulnerable youngster before species recognition is clear.
At the same time, the story is valuable precisely because its limits are visible. It does not provide a hidden ending, a proven mechanism or a universal rule about loon behavior. It records one extraordinary encounter in British Columbia, interpreted with care by a researcher, and leaves the duckling’s later life unresolved.
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