Tarsius, Maleo, and Babirusa are among the rare species that can be found here. Birds include the knobbed hornbill, Sulawesi hornbill and maleo. Casrelgerundo borders the following municipalities&colon; Formigara, Castiglione d'Adda, Maleo, Terranova dei Passerini, Pizzighettone, Cavacurta, Codogno. The city is served by Maleo Airport, opened in March 2017. A maleo chick is completely self-sufficient only hours after hatching. The maleo megapode is endemic to the island and is the park's mascot. The maleo is endemic to Sulawesi and the nearby smaller island of Buton in Indonesia. The maleo is also associated with these genera, and together the three form a group. Maleo, for example, is a bird species whose eggs are larger than their own body.