- Eagle figure San Agustin
- Drymonia coccinea - what a unique colorful flower this Gesneriaceae vine sports! Seen in Isla Escondida
- Dolmen grave in San Agustin
- Doble Yo at the Alto de las Piedras San Agustín
- Detail of the gorgeous stromata of Beauveria sp. on small grasshopper
- Daniel with Don Jorge's friendly parrot in Pauna
- Cystoderma?, note the ring and scaly stem, Isla Escondida
- Cyphellostereum pusiolum, a basidio-lichen with its fruiting bodies growing on a rock .
- Cyphellostereum pusiolum showing top and underside of fruiting body with scale 10mm = 1cm
- Cyphellostereum pusiolum growing on rock. This organism is a basidio-lichen in the Hygropharaceae.
- Cyathea Fern forest common in El Cedro
- Crepidotus sp. growing from dead wood in Pauna, Boyaca
- Crepidotus sp. branch (diameter about 10cm) close up. Reserva El Cedro, South Huila, 2000m
- Could be an infected immature Hymenochaete damaecornis seen in Isla Escondida, Putumayo
- Coriolopsis (Funalia) rigida seen in San Agustin
- Coriolopsis (Funalia) rigida pores with scale in San Agustin
- Coriolopsis (Funalia) rigida pores seen in San Agustin
- Cordyceps tenuipes (= Isaria tenuipes) seen in Charhuayaco near Pitalito
- Cordyceps sp. growing from a Lepidoptera larva, Isla Escondido, Putumayo
- Cordyceps sp. growing attached on a leaf, in Isla Escondida, Putumayo