Platypus -

The Platypus: An Evolutionary Paradox and Endangered Icon The platypus ( Ornithorhynchus anatinus ), endemic to the freshwater systems of eastern Australia and Tasmania, is one of the most evolutionarily distinct mammals on Earth. As a monotreme—a mammal that lays eggs rather than giving birth to live young—it holds a unique position in evolutionary history, often described as a mosaic of reptilian, avian, and mammalian features. This semi-aquatic creature has survived for millions of years but is now facing significant population declines, with recent studies elevating its status to "Near Threatened". Evolutionary History and Taxonomy

What Scientists Learned from the Oldest Wild Platypus Ever Found Platypus

The platypus is highly adapted to its semi-aquatic lifestyle, weighing between 1.3 to 3.7 kg for females and up to 6.6 kg for males, with a total length around 50 cm. The Platypus: An Evolutionary Paradox and Endangered Icon