[1] Because the species was named for a hatchling specimen, it cannot be matched with adult specimens, and so it is impossible to determine which, if any, birds from the same rocks represent adults of this species.

[2] In 1999, Hou and Chen of the Nanjing Institute of Paleontology and Geology briefly described a specimen of very small bird obtained by the museum and named it Liaoxiornis delicatus.

[4] The type specimen is complete and articulated, and while it has mature flight feathers, features such as bones tipped in cartilage, small breastbone, large head and eye and unfused skeleton indicate that it was a juvenile.

Zhou and Hou (2001) assigned it to the group Enantiornithes, and described it as being equally as advanced as Cathayornis.

[5] Several other specimens of juvenile enantiornithines have been found in the same strata, but because all of them are juveniles, it is impossible to discern whether or not they represent the same species, and later authors have suggested that the taxon should be ignored as invalid for this reason.