English: Reconstruction of Archaeorhynchus growth stages, with the new juvenile LNTU-WLMP-18 on the left. Note the nearly adult-like proportions of the wing bones and primary feathers, even though the trunk is only about half as long as in an adult. Subadult stage in the center reconstructed from IVPP V14287, 17,075, 17,091, and STM7-11 (Zhou and Zhang, 2006; Zhou et al., 2013; Wang et al., 2018b; respectively), with still unfused metacarpals. Adult stage on the right reflecting IVPP V20312 (Wang et al., 2016), with plumage inferred from subadults. Scale bar in cm.