camouflages

In the depths of the South American forests lives a bird that has inspired legends, myths and night terrors and is called the ‘ghost bird’, although his real name is urutaú. At first glance it is just a piece of wood that acts as an extension of the tree on which it perches like a chameleonbut behind this mimicry lies a biology that makes many scientists very curious to see it live even if it is really complicated. An ornithologist. The urutaú is not a bird that one finds by chance, but one must know how to look. Mauricio Silvera, a young Uruguayan amateur ornithologist who has been observing birds since he was five years old, knows this premise well, and according to a recent report from the BBCMauricio has turned observing this elusive species into a true passion. In popular culture, the melancholic song of the urutaú has fueled all kinds of folklore and rural legends in South America. However, for observers like Silvera, the true “magical power” of this species is not in the myths, but in its plumage and its peculiar way of ‘hiding’. A chameleon. It is no wonder, since we are not talking about it going slightly unnoticed, but rather its ability to imitate the bark of trees It is so perfect that sighting records on scientific platforms often require exhaustive photographic confirmation. And it is no wonder, because without this evidence it is difficult to convince the experts that they are not looking at a simple branch and a small irregularity that corresponds to this bird. How he does it. Disappearing in broad daylight is not something easy to achieve, but here science has different answers that go far beyond the simple color of their feathers. The key is in visual crypsis, where research shows that these birds not only have a plumage pattern that blends with the environment, but also make active decisions about where to perch in trees. And it is that a 2017 study on the choice of backgrounds showed that these birds carefully select the place where they rest to maximize the coincidence of patterns with their environment, which increases the survival rate against predators. And if they don’t see it, they can go completely missing. Modify your smell. Beyond the visual, researchers were able to see in a fascinating 2022 study that these birds have the ability to change your scent profiles in different seasons to prevent predators from being able to smell them. Echolocation. Unlike most birds, owls have developed this system, emitting acoustic signals to navigate in the darkness of Venezuelan and South American caves, similar to bats. Furthermore, their role in the ecosystem is vital, since research into the “secret life” of these birds reveals that they are formidable seed dispersers. They spend entire days in the trees regurgitating the seeds of the fruits they consume, acting as true foresters who maintain the ecological connectivity of Neotropical forests. A story of the search. As we see, it is not easy to find this bird and that is why Mauricio Silvera relates that finding it is “an adrenaline rush like in the chest of not knowing what to do: whether to scream, take the photo and tell someone.” Even this biology student makes a very comical simile when he sees that it is “almost like looking for Pokémon and seeing how many little birds you find and if you find the rarest one.” Your adventure always begins with a location or a photo that indicates that the bird may be present in a specific place. But due to its great ability to hide, it means that your trips do not always end with a photograph of this bird, much to your misfortune. Images | Wikipedia In Xataka | “Emergency room mentality”: the Dutch philosopher convinced that saving snails is saving ourselves