 Launching varied radically among ctenochasmatoids.In forms like "Cycnorhamphus", long limbs and shorter torsos meant a level of relative ease.In forms like "Pterodaustro", however, which possessed long torsos and short limbs, launching might have been a more taxing and prolonged affair, only possible in large open areas, just like modern heavy-bodied aquatic birds such as swans, even with the pterosaurian quadrupedal launching.