- Cantharellus sp. hymenium found in Pauna's oak forest.
- Capuchin monkey
- Capuchin monkey eating fruit
- Castilleja sp., a paintbrush flowering in Chauna, Boyacá, Colombia
- Caterpillar among immature spiny Mycena pins seen in Los Santos, Santander
- caulifloric blue berried Miconia septuplinervia growing in Rio Claro.
- Chauna landscape, Boyacá
- Chlorociboria sp. fruiting bodies cose up
- Chlorociboria fruiting bodies
- Chlorociboria sp. on oak
- Clathrus archeri egg seen in Villa de Leyva
- Clathrus archeri seen in Chauna, Boyacá, Colombia
- Clathrus archeri stinkhorn spreading its tentacles
- Clathrus archeri stretching its tentacles in Villa de Leyva
- Clavulina sp. seen in Pauna
- Coltricia sp., which is an oak associated ectomycorrhizal seen in Pauna
- Cookeina sulcipes, still very young Rio Claro
- Cookeina tricholoma - one of my favorites, pleasing the eye and the palate.
- Cookeina tricholoma, the widely distributed edible Hairy Jungle cup encountered in Rio Claro
- Coprinellus disseminatus in Rio Claro, Antioquia