| Terms for subject Ornithology (132 entries) |
| alpekaie | brân goesgoch | |
| and | hwyaden | |
| due | ysguthan | |
| due | colomen | |
| dvergspett | cnocell fraith leiaf | |
| falk (vandrefalk) | hebog | |
| fasan | ffesant | |
| flaggspett | cnocell fraith fwyaf | |
| gjøk | cog | |
| gribb (gåsegribb) | fwltur | |
| gribb (gåsegribb) | fultur | |
| grågås | gŵydd wyllt | |
| grønnspett | cnocell werdd | |
| gås | gŵydd | |
| hakkespett | cnocell | |
| hegre (gråhegre) | crëyr | |
| hornugle | tylluan gorniog | |
| hubro | tylluan fawr | |
| hubro | tylluan eryraidd | |
| høne | cyw |