What are the chances of seeing a Fork-tailed Sunbird in Cuc Phuong National Park?
Likely
About 60% of wildlife watchers report a Fork-tailed Sunbird sighting in Cuc Phuong National Park on a given day, based on 181 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 2nd most-seen of the 159 birds we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
When is the best time to see a Fork-tailed Sunbird in Cuc Phuong National Park?
December
In that month about 70% of wildlife watchers report a Fork-tailed Sunbird in Cuc Phuong National Park on a given day, against about 30% in May and August, the lowest months. That is one of Cuc Phuong National Park's driest months, with about 40 mm of rain against 390 mm in August. July has too few records to rate.
What time of day is best to see a Fork-tailed Sunbird?
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Fork-tailed Sunbird sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Where else can you see a Fork-tailed Sunbird?
Only Cuc Phuong National Park, in our data
Cuc Phuong National Park is the only park on Wallace's Line with enough records to rate Fork-tailed Sunbird sightings: about 60% of wildlife watchers there report one on a given day.
Where does the Fork-tailed Sunbird sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Fork-tailed Sunbird is recorded against all the birds logged in Cuc Phuong National Park (181 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.