The Largest Pterosaur

 From Atlas Obscura: "Was ‘Dracula’ the Biggest Flying Creature Ever?" The article begins:

    “It’s just such an awesome image to think about: a giant flying dragon, essentially, coming down and preying on these dinosaurs,” says Ben Thomas, a paleontology graduate student at the University of Portsmouth, England. Earlier this year, Thomas released a video on his paleontology-themed YouTube channel about his visit to the Altmühltal Museum in Denkendorf, Germany. There, he spoke with paleontologist Nizar Ibrahim about one of the museum’s most remarkable specimens. It’s the fragmentary remains of a pterosaur—a flying reptile—that lived in Transylvania, Romania, 66 million years ago, and just might be the largest animal that has ever flown. Scientists have nicknamed it “Dracula.”

    The Altmühltal Museum displays a cast of Dracula’s remains, alongside a model skeleton and a life-sized statue of the creature. At an estimated 11.5 feet tall, with a wingspan of 37.4 to 39.4 feet, Dracula was comparable to a giraffe when standing, or a small airplane in flight. “Seeing it on the ground really gives you a proper sense of scale, that these were absolutely terrifying animals if you ever encountered them,” says Thomas. Members of the Azhdarchidae family of pterosaurs, to which Dracula belonged, are famous for their size, but “generally the accepted wingspan for all of the others is about 10 meters [32.8 feet] at most,” says Thomas, making Dracula a giant even among its relatives.

 Also:

    ... Some paleontologists theorize that pterosaurs launched themselves into flight from all fours, pushing off with their front limbs, a method not seen in any living creature.

    Thomas explains how pterosaur anatomy confirms the theory of “quad-launching.” While birds have enlarged muscles in their wings for flying and in their legs for launching, “with pterosaurs, you have that all sort of contained in one area” in the chest, he says. “It’s essentially a more mass-efficient way of taking off, which is presumably how they got so much bigger than birds.”