Quetzalcoatlus and other azhdarchids have forelimb and hind limb proportions more similar to modern running ungulate mammals than to members of other pterosaur clades, implying that they were uniquely suited to a terrestrial lifestyle. The wings were short and broad, and like in all pterosaurs, forelimb musclature was extensive. Flapping power came from several muscle groups on the torso, forearm and manus (hand). The humerus was short and robust, with considerable mobility. Its morphology differs somewhat between species, with Q. lawsoni's humerus having a proportionally shorter deltopectoral crest, and Q. northropi's being shaped more like a twisted hourglass. The ulna of Q. northropi was relatively shorter than that of Q. lawsoni, measuring 1.36 times the length of the humerus, as opposed to 1.52 times the length of the humerus in Q. lawsoni and other azhdarchiforms. The wing finger may have been between the elbow and the torso whilst on land. The first digit is the smallest, and the third is the biggest, with the exception of the wing finger. The femur was significantly more gracile than the humerus, though is still among the most robust bones in Quetzalcoatlus' skeleton, judging by Q. lawsoni. Azhdarchids overall had fairly narrow feet, no longer than 30% of the length of the tibia, which may have born fleshy pads, similar to those of tapejarids. Q. lawsoni possessed well-developed pedal (foot) unguals, which supported moderately curved claws, shorter and slightly straighter than those of tapejarids.
Quetzalcoatlus and other azhdarchids have forelimb and hind limb proportions more similar to modern running ungulate mammals than to members of other pterosaur clades implying that they were uniquely suited to a terrestrial lifestyle The wings were short and broad and like in all pterosaurs forelimb musclature was extensive Flapping power came from several muscle groups on the torso forearm and manus (hand) The humerus was short and robust with considerable mobility Its morphology differs somewhat between species with Q lawsoni's humerus having a proportionally shorter deltopectoral crest and Q northropi's being shaped more like a twisted hourglass The ulna of Q northropi was relatively shorter than that of Q lawsoni measuring 136 times the length of the humerus as opposed to 152 times the length of the humerus in Q lawsoni and other azhdarchiforms The wing finger may have been between the elbow and the torso whilst on land The first digit is the smallest and the third is the biggest with the exception of the wing finger The femur was significantly more gracile than the humerus though is still among the most robust bones in Quetzalcoatlus' skeleton judging by Q lawsoni Azhdarchids overall had fairly narrow feet no longer than 30% of the length of the tibia which may have born fleshy pads similar to those of tapejarids Q lawsoni possessed well-developed pedal (foot) unguals which supported moderately curved claws shorter and slightly straighter than those of tapejarids