The long-tailed cuckoo (its young being fed here by a grey warbler) winters over in the Pacific Islands and flies south in spring. Polynesians would have noted the seasonal arrival and departure of the bird and realised it was heading towards land somewhere. This may have fuelled speculation about undiscovered islands in the vast Pacific Ocean.
Using this item
Permission of the Alexander Turnbull Library, National Library of New Zealand, Te Puna Mātauranga o Aotearoa, must be obtained before any re-use of this image.