- Capped Herons - Pilherodius pileatus 1 in flight DW Ms
- Capped Herons - Pilherodius pileatus 2 on branch DW Ms
- Capybara family- Hydrochaeris hydrochaeris DW Ms
- Caripia montagnei field
- Caripia montagnei RioClaro
- Carludovica palmata Panama Hat Toquilla palm
- Chagdü Gompa Nyarong Ms
- Chonta dura fruits Bractis gassipae
- Cladonia cristatella British soldier lichen
- Clathrus archeri Iguaque hanging
- Cliff big Rio Claro
- Cliff Rio Claro
- Collared toucan - Pteroglossus torquatus
- Collared toucan - Pteroglossus torquatus on branch
- Collybia sl DW MS
- Cookeina sulcipes Mariquita
- Cookeina sulcipes RioClaro
- Cookeina tricholoma RioClaro
- Coprinellus disseminatus gray RioClaro
- Coprinellus disseminatus RioClaro