The Pasonanca Natural Park is a protected area that preserves a major watershed in the southern Philippine island of Mindanao in the Zamboanga Peninsula.

The ASEAN Center for Biodiversity, DENRA unveiled the Park's pyramid-Philippine eagle monument, since it is the national bird's-Mindanao bleeding-heart habitat and Refugia[4][5] The Pasonanca Natural Park covers an area of 12,107 hectares (29,920 acres) and a buffer zone of 5,307 hectares (13,110 acres) in the southern end of the Zamboanga Cordillera mountain range that runs north to south serving as the backbone for the peninsula of Zamboanga.

[3] The park is home to several unique reptile species, including the endemic lizard Eutropis alcalai, known only from specimens collected within its boundaries.

[8] The holotype of Cyrtodactylus jambangan was also discovered here, with this gecko species observed to be common in the park's pristine, low-elevation gallery forests.

[9] Other endemic reptiles found in the park include the Mindanao keelback[10] and the Philippine small-disked frog.

[11] The park is also home to endemic flora such as Sonerila mapelo, discovered in 2022 and is one of only three Sonerila species found in the country;[12] and at least 18 Philippine endemic trees including the white lauan, katmon, antipolo, balakat, Celtis luzonica, Hopea acuminata, and Myristica philippensis.