Mark Jones / Sulawesi Red-knobbed Hornbill (Aceros cassidix) breeding male in a fruiting Fig tree (Ficus forsteni) 32 meters above the ground in rainforest canopy, Tangkoko-Dua Saudara Nature Reserve, Sulawesi, In...

Mark Jones / Sulawesi Red-knobbed Hornbill (Aceros cassidix) breeding male in fruiting Fig (Ficus forsteni), Tangkoko-Dua Saudara Nature Reserve, Sulawesi, Indonesia

Tui De Roy / Celebes Black Macaque (Macaca nigra) stripping fig (Ficus forstini) of ripe fruit, Tangkoko-Dua Saudara Nature Reserve, Sulawesi, Indonesia

Tui De Roy / Sulawesi Red-knobbed Hornbill (Aceros cassidix) male in a fruiting fig (Ficus forsteni) tree, Tangkoko-Dua Saudara Nature Reserve, Sulawesi, Indonesia

Tui De Roy / Tarictic Hornbill (Penelopides panini) male delivering Figs (Ficus forstini) to female sealed inside hollow tree, Tangkoko-Dua Saudara Reserve, Sulawesi, Indonesia

Tui De Roy / Sulawesi Red-knobbed Hornbill (Aceros cassidix) breeding male in a fruiting Fig (Ficus forsteni) tree, 32 meters above the ground in rainforest canopy, Tangkoko-Dua Saudara Nature Reserve, Sulawesi, I...