This site presents the idea that birds developed from flying pterosaurs.
This is a credible alternative to the current, mainstream idea that birds developed from land-based dinosaurs.
Sorry but that chart does not show lineage.
Do you say that because cladograms do not show lineage? By "lineage" I mean ancestor/descendant relationships.
This chart does not show ancestor/descendant relationships. Cladograms really don't either.
Did you notice the 5 separate green lines, one of which is owls. Their ancestry is different than the rest of the green lineages. That is consistent with my placement of owls separate from the others.