The problem was that while they were well documented at some sites, usually the ones with the very nice animals, there was also a large number of them where it was very vague -- there wasn't a lot of description or detail.
Das Problem war, dass sie zwar an einigen Stätten gut dokumentiert waren, meist dort, wo es sehr schöne Tiere gab, aber an vielen Stätten war  die Dokumentation sehr vage; es gab wenige Beschreibungen oder Details.