The Architecture of Avian Pterylosis: Exploring the Hidden Map of Birds
Exploring pterylosis: The Invisible Map of a Bird While watching a colourful Hummingbird gliding next to an equally beautiful blossom or a pigeon patting its bright pink feet at a little distance, their plumage seems to be continuous, all-encompassing tight suit of armour. At first glance, a bird appears to be a seamless miracle of fluff and aerodynamic precision. Whether it is the iridescent throat of a hummingbird or the slate-grey mantle of a pigeon, the plumage seems to be continuous. But pluck away the mystery (or, more gently, observe a hatchling in its first days) and observing a plucked chicken, while plucking or after plucking, the sites show small indentations on skin. Those swollen dots, if noticed carefully, reveal a strange, hidden geography. Take a closer look, these will reveal a hidden blueprint at work, guiding each feather to its spot with pinpoint accuracy. This invisible map shapes a bird's plumage from the start, driven by genes and signals deep i...
