| Terms for subject Ornithology (166 entries) |
| alpkaja | brân goesgoch | |
| and | hwyaden | |
| anka | hwyaden | |
| berguv | tylluan fawr | |
| berguv | tylluan eryraidd | |
| duva | ysguthan | |
| duva | colomen | |
| duvhök | gwalch marthin | |
| falk (pilgrimsfalk) | hebog | |
| fasan | ffesant | |
| gam (gåsgam) | fwltur | |
| gam (gåsgam) | fultur | |
| gräsand | hwyaden wyllt | |
| grågås | gŵydd wyllt | |
| gröngöling | cnocell werdd | |
| gås | gŵydd | |
| gök | cog | |
| hackspett | cnocell | |
| hornuggla | tylluan gorniog | |
| häger (gråhäger) | crëyr |