Saturday, 9 May 2015 was the date of eBird’s inaugural Global Big Day, where citizen-science birders working with eBird (and the Cornell Lab of Ornithology which founded eBird) attempted to observe and record as many bird species as possible in a single day, while raising $500,000 for global bird conservation. And, guess what, over 4,000 species were logged in meaning that this effort in citizen science ended up recording more than half of the bird species in the world – in a single day! Well done eBird, we look forward to many more Global Big Days in the future. For more information on Eremaea eBird, see page 14. For background on the value of citizen science, see page 12.