Editing Cagayan River (section)

==Flora and fauna==
The Cagayan River passes through one of the few remaining [[primary forest]]s in the Philippines.

It supports the lives of numerous endemic and endangered species, like the Luzon bleeding-heart pigeon (''[[Gallicolumba luzonica]]''), Philippine eagle (''[[Pithecophaga jefferyi]]'') and a rare [[riverine]] fish, locally called ''ludong'' (''[[Lobed river mullet|Cestreaus plicatilis]]'').

The ''ludong'' spawns in Cagayan River's upper reaches in [[Jones, Isabela]]. In late October until mid-November, the fish travel down the river to release their eggs at the river mouth near Aparri.

In February, ludong fry by the millions are again caught in fine nets as these travel upstream.

Due to the dwindling number of ludong caught yearly, local governments have imposed a ban on catching the fish and its fry, but the ban has failed.