Figure 4: Examples of two rare species that are confined to near-natural forests: A) Hydraena nielshaggei Freitag & Jäch from Palawan, B) H. yangae Jäch, Díaz, & Skale from Singapore; and one typical representative of an undemanding species group: C) H. scabra d’Orchymont, a widely distributed species in the Philippines.