. . . "The birds circle-soared in the drafts above the vents, rising to a height of 100-200 meters (328-656 ft.), before gliding off to nearby roosts.???Read moreShow lessVultures find artificial thermals just right for soaring - BirdWatchingbirdwatchingdaily.comBlack and Turkey Vultures, like hawks, pelicans, storks, and other birds, would rather soar than flap." . .