HE GRABS HER TO KEEP THE UNION INTACT (Time - 12:05:57). In what appears to me as an effort to keep movement and bouyancy from separating the union,
the male holds onto the underwater female, in the process also submerging most of his head.

Philippine Duck
(a Philippine endemic)

Scientific name - Anas luzonica

Habitat - Freshwater marshes, shallow lakes and ricefields.

[20D+ 500 f4 L IS + stacked Canon/Tamron 1.4x TCs, 1000 mm, f/11, bean bag]