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Fig. 2 | Frontiers in Zoology

Fig. 2

From: Evolution of beak morphology in the Ground Tit revealed by comparative transcriptomics

Fig. 2

Ancestral states reconstruction for beak length and shape of 13 parid species. The node labels in the length tree (left) are the estimated length of ancestral beaks. The beak profiles corresponding to the nodes in the shape tree (right) are the estimated ancestral beak shapes. The blue profiles are the average shape, while the black profiles are the real shape. The images of beaks were taken from specimen of National Zoological Museum of the Institute of Zoology, Chinese Academy of Sciences

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