| Common Name | Scientific name |
|---|---|
| Humboldt's Sapphire | Hylocharis humboldtii |
| Hume's Leaf Warbler | Phylloscopus humei |
| Hutton's Vireo | Vireo huttoni |
| Hwamei | Garrulax canorus |
| Iago Sparrow | Passer iagoensis |
| Iberian Chiffchaff | Phylloscopus ibericus |
| Iberian Grey Shrike | Lanius meridionalis |
| Iberian Magpie | Cyanopica cooki |
| Iberian or Ashy-headed Wagtail | Motacilla flava iberiae / cinereocapilla |
| Iceland Gull | Larus glaucoides |
| Icterine Warbler | Hippolais icterina |
| Iiwi | Drepanis coccinea |
| Imperial Parrot | Amazona imperialis |
| Imperial Woodpecker | Campephilus imperialis |
| Inagua Woodstar | Calliphlox lyrura |
| Inca Dove | Columbina inca |
| Inca Tern | Larosterna inca |
| Indian Peafowl | Pavo cristatus |
| Indigo Bunting | Passerina cyanea |
| Intermediate Egret | Ardea intermedia |
| Isabelline Wheatear | Oenanthe isabellina |
| Island Scrub-Jay | Aphelocoma insularis |
| Isthmian Wren | Cantorchilus elutus |
| Italian Sparrow | Passer italiae |
| Ivory Gull | Pagophila eburnea |
RingBase adheres to EURING codes.
