Early origin of sweet perception in the songbird radiation

@article{Toda2021EarlyOO,
  title={Early origin of sweet perception in the songbird radiation},
  author={Yasuka Toda and Meng-Ching Ko and Qiaoyi Liang and Eliot T. Miller and Alejandro Rico-Guevara and Tomoya Nakagita and Ayano Sakakibara and Kanako Uemura and Timothy B Sackton and Takashi Hayakawa and Simon Yung Wa Sin and Yoshiro Ishimaru and Takumi Misaka and Pablo Ote{\'i}za and James D. Crall and Scott V. Edwards and William A. Buttemer and Shuichi Matsumura and Maude W. Baldwin},
  journal={Science},
  year={2021},
  volume={373},
  pages={226 - 231}
}
From savory to sweet Seeing a bird eat nectar from a flower is a common sight in our world. The ability to detect sugars, however, is not ancestral in the bird lineage, where most species were carnivorous. Toda et al. looked at receptors within the largest group of birds, the passerines or songbirds, and found that the emergence of sweet detection involved a single shift in a receptor for umami (see the Perspective by Barker). This ancient change facilitated sugar detection not just in nectar… 
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