sentences:  Witton also found that due to their relatively slighter flight-musculature, istiodactylids were adapted to launching from the ground like vultures, rather than from water like other ornithocheiroids.He also considered the fact that istiodactylid fossils are mainly found in sedimentary deposits that represent freshwater or brackish water, which received much terrestrial input, evidence that supports the idea of them scavenging in terrestrial settings.Witton found it unlikely that istiodactylids and their relatives were especially proficient on the ground, due to their disproportionate limbs and small appendages, though they may have had relatively large thigh muscles.