| Terms for subject Ornithology (69 entries) |
| abutre (grifo/abutre cinzento) | fwltur | |
| abutre (grifo/abutre cinzento) | fultur | |
| andorinha | gwennol | |
| avestruz | estrys | |
| açor | gwalch marthin | |
| bufo pequeno | tylluan gorniog | |
| bufo real | tylluan fawr | |
| bufo real | tylluan eryraidd | |
| cegonha | ciconia | |
| chapim | titw mawr | |
| cisne | alarch | |
| codorniz | sofliar | |
| coruja | tylluan | |
| coruja das torres | tylluan wen | |
| coruja do mato | tylluan frech | |
| corvo | cigfran | |
| cuco | cog | |
| estorninho | drudwen | |
| faisăo | ffesant | |
| falcăo (falcăo peregrino) | hebog |