English: A size comparison and soaring styles of large flying animals. A size comparison and soaring styles of extinct giant birds (Pelagornis sandersi and Argentavis magnificens), pterosaurs (Pteranodon and Quetzalcoatlus), the largest extant dynamic soaring bird (wandering albatross), the largest extant thermal soaring terrestrial bird (California condor), a large extant thermal soaring seabird (magnificent frigatebird), and the heaviest extant volant bird (kori bustard). The icons indicate dynamic soarer, thermal soarer, and poor soarer and summarize the main results of this study. The red arrows indicate the transition from a previous expectation or hypothesis to the knowledge updated in this study.