Lamperornis (meaning glowing bird) and Avinychus (meaning bird with claws) are 2 Enantiornithines that are closely related, but live in different environments (Avinychus lives in the Temperate forests of central Laramidia, while Lamperornis lives in the Tropical forests of southern Laramidia).
Lamperornis is more notable than Avinychus because of its blue and green bioluminescent feathers.
Sorry for no size comparison because birds and Protobirds are usually measured by wingspan, but these 2 Protobirds both have their wings folded, which makes it hard to measure their wingspan. Just imagine both of these Protobirds to be roughly the size of a typical songbird.
NOTE: I use the term "Protobird" to refer to Non-Avian Avialans, as "Bird" specifically refers to the group Aves, which these 2 animals are not.
