| Catalogue numbers for bird stamps from Biafra |
| Year | Date | Description | SG | Michel | Scott | Yvert | ÅE | KSissue | KS |
| 1968 | Overprint SOVEREIGN BIAFRA on Nigeria 1966.02-03 | 6,9-10,12 | 6,9-10,12 | 11,14-15,17 | 1-4 | 1968.01 | 1-4 | ||
| 1968 | Overprint SOVEREIGN BIAFRA on Nigeria 1966.01-02 | 7,11,16 | 7,11,16 | 12,16,21 | 5-7 | 1968.02 | 5-7 |
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