| Iamandi, GG (1) | Iannantuono, RF (1) | Ibarra, J (21) |
| Ignoffo, CM (4) | von Ihering, H (3) | Ihrig, M (1) |
| Ikan, R (1) | Ikeda, N (2) | Ikeda, N (1) |
| Ikizoglu, G (1) | Ikusawa, M (1) | Ilhan, F (1) |
| Ilieva, MN (1) | Illingworth, JF (1) | Illyes, EF (1) |
| Im, KI (1) | Imam, IZ (1) | Imam, ZI (1) |
| Imandeh, NG (1) | Imber, MJ (2) | Imbuga, MO (2) |
| Imes, M (4) | Imes, M (5) | Immelmann, K (1) |
| Imms, AD (2) | Inapogi, AP (1) | Ineson, MJ (1) |
| Ingber, A (3) | Ingram, JH (1) | Innes, JRM (1) |
| Institute, AFUS (1) | International Commission on Zoological, N (6) | Ioffe-Uspensky, I (2) |
| Iqbal, Z (1) | Irnazarova, GR (1) | Irwin, RE (1) |
| Irwin-Williams, C (1) | Isacsohn, M (1) | Isam, C (1) |
| Isawa, H (2) | Ishikawa, H (1) | Isidro de Farias, AM (2) |
| Isla Garcia, M (1) | Islam, R (1) | Issert, V (1) |
| Ito, S (2) | Iurchuk, BG (1) | Ivanova, EP (1) |
| Iwuala, MO (1) | Iwuala, MOE (1) | Izdebska, JN (1) |
| Izri, M (1) | Izri, MA (1) | |