Rediscovering Asian Golden Weaver in Central Vietnam


© Natthaphat Chotjuckdikul


By Maurizio Saroli


On 4th October 2025, I spotted two Asian Golden Weavers Ploceus hypoxanthus in the paddy fields near Hoi An. One was unmistakably male, the other likely a female or immature male. It was a brief encounter, but one that stirred a mix of excitement and curiosity—not just because of the sighting itself, but because of what it might mean for the species’ status in central Vietnam.

The Asian Golden Weaver isn’t typically expected in this region. Its known range is largely confined to parts of Thailand, Cambodia and southern Vietnam. Yet this wasn’t my first encounter with the species here. I’d previously recorded a pair at Asia Park in Danang, with sightings dating back to 2019. The question remains: are these isolated individuals, or are we seeing the early signs of a return?

One of the challenges in confirming range expansions—or even basic distribution—is the lack of consistent birding data in Vietnam. eBird statistics paint a stark picture: fewer than 50,000 checklists have been submitted from Vietnam, compared to over 2 million from the UK, for example. The majority of Vietnam’s submissions come from visiting birders who spend a week hopping between national parks in search of endemics. Resident birders are few and far between, and whole swathes of the country remain unrecorded. Vietnam lacks the infrastructure that supports citizen science in other countries: regional bird clubs, ornithological societies, and a culture of regular reporting. That’s slowly changing, but for now it means that sightings like mine can challenge established assumptions.

This data gap has real consequences. Range maps, often treated as gospel, are built on incomplete foundations. I’ve learnt to take them with a pinch of salt. Back in 2019, for example, I reported Asian Green Bee-eaters in Danang during the winter, only to have my records questioned by eBird moderator Craig Robson. Even with detailed field notes, my sightings were not accepted until I uploaded a photo. The birds are resident throughout the year, but the data wasn’t there to back me up. It’s not that the birds are missing—it’s that the birders are. Robson is well-known and undoubtedly knowledgeable, but his decision felt emblematic of a broader issue: the tendency to prioritise centralised expertise over local, firsthand observation. One has to wonder—how much weight is given to records from people on the ground, especially in regions that moderators may never have personally visited?

In a funny coincidence, the Asian Green Bee-eater checklist I mentioned also includes my first sightings of Asian Golden Weaver in Danang. Revisiting these checklists, I noticed that the weaver record was quietly rejected by the same moderator. Unlike the bee-eater, I wasn’t notified of this decision. I revisited my field notebook from that period and found detailed, diagnostic notes on the species. At the time, I wasn’t routinely transcribing my field notes into eBird, but I would have done so had I been informed of the species’ rarity in the region. Even so, it seems that would have done little good. For, my recent record was also initially dismissed - this time as Baya Weaver - despite my detailed field notes which clearly described the plumage of a male Asian Golden Weaver. It's just as well I managed to get a photo this time around, because without it this record would not have been accepted.

It’s a reminder that even well-documented observations can slip through the cracks if supporting context isn’t surfaced at the right moment. This kind of communication gap does a disservice to the data—and to the observers trying to contribute it. To strengthen the integrity of data, moderators should recognise that accurate field notes and firsthand observations deserve serious consideration. Dismissing them without engagement risks undermining both the data and the contributors who work hard to collect it. Even when engagement occurs, dismissing well-supported records—especially those backed by diagnostic notes—risks discouraging contributors and weakening the data ecosystem.

The question of whether the Asian Golden Weaver I saw was an escapee is valid. Captive birds do occasionally find their way into the wild, and without banding or behavioural data, it’s hard to be certain. But the presence of a second bird—likely a female—suggests something more. Escapees tend to be solitary. A pair hints at breeding potential.

Thailand saw a bounce-back in Asian Golden Weaver populations in recent years. Could Vietnam be next? The habitat is certainly suitable. Paddy fields, reed beds and wet grasslands offer ideal nesting sites. The challenge is confirming whether these birds are establishing territory or just passing through.

The Asian Golden Weaver is more than just a pretty bird. Its presence in central Vietnam challenges assumptions, invites scrutiny and reminds us that nature doesn’t always follow the lines we draw on maps. For birders in Vietnam, it’s a call to action. Submit your checklists. Take photos. Question the data. The more we observe, the clearer the picture becomes. 



Maurizio is the contributing editor of DBC News, part of Danang Bird Club, a non-profit organisation focused on citizen science, education and advocacy for the conservation of Vietnamese avifauna. He is the author of Birdwatching in Central Vietnam; a guide to the region’s rich avian diversity. Originally from London, Maurizio was a member of the British Trust for Ornithology and took part in national bird surveys like the Nest Record Scheme and the Breeding Bird Survey before bringing his passion for ornithology to Vietnam. 



www.danangbirdclub.blogspot.com
www.facebook.com/DanangBirdClub
www.amazon.com/dp/B0FMQ33FXD
www.avisbirdingadventures.com
Location: Vietnam

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