unbefiederte Körperstellen wie Beine und Schnabel.
Birds are a diverse group of endothermic vertebrates and the only living animals with feathers. They are also characterised by a toothless beak, forelimbs modified into wings, and reproduction via hard-shelled eggs. Their lightweight yet strong skeleton and highly efficient respiratory system enable most species to fly. With more than 11,000 known species, birds have colonised almost every habitat on Earth, from tropical rainforests and deserts to high mountains and polar regions.
…that some birds can sleep with only one half of their brain at a time? While one half of the brain sleeps, the other remains active, and one eye even stays open. This allows them to continue monitoring their surroundings and detect potential threats. Some bird species even use this remarkable ability during long periods of flight.
…that birds do not have sweat glands? To release excess body heat, they use several strategies, including panting, increasing their breathing rate, holding their wings away from the body, and losing heat through unfeathered areas such as their legs and beak.
