A bird-pollinated flower with a rather ingenious twist

When researchers studying several bird-pollinated species of Impatiens flowers in the mountains of western Cameroon noticed one with an odd, upwardly curving nectar spur, they couldn't imagine how any sunbird could ever sip from it. After recording visitors to the flower continuously for a period of days, they had their answer, which they report in the Cell Press journal Current Biology on September 8.

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