Bird count
Global Big Day
Global Big Day: next dates not yet announced. Organised by eBird (Cornell Lab of Ornithology).
A single day in May when birders around the world go out and report what they see, part of World Migratory Bird Day.
It is organised by eBird (Cornell Lab of Ornithology). Birbs is not involved in running it — the details below are taken from the organiser's own site, which has the final word.
When is the next Global Big Day?
The next dates have not been announced by eBird (Cornell Lab of Ornithology) yet. A Saturday in May, on World Migratory Bird Day.
The last Global Big Day was held on 9 May 2026.
How to take part
- Spend even 5–10 minutes birding on the day.
- Report what you see to eBird or through the Merlin app.
Get ready on Birbs
- Identify a Bird — narrow down a bird you are not sure of
- Identify a Bird Sound — for the ones you hear but cannot see
Dates and details checked against the organiser's site on 1 October 2026.