| Abbrev | Name | Spec | Type | Locality |
|---|---|---|---|---|
| BRID1 | BRIDLED-TERN-1[1281]; | TR.DR | S | MEX |
| BRID | BRIDLED-TERN[1281]; | TR.DR | S | MEX |
| BRST | BRIMSTONE[1281]; | TR.AE | GBR | |
| BROMUK | BROOM-GREAT-BRITIAN[1281]; | TR.AE | GBR | |
| BRND | BRUNDA[1281]; | TR.AE | ITA | |
| BT2123 | BT-2123[1281]; | TR.AE | S | MAR |
| BT2281 | BT-2281[1281]; | TR.AE | ||
| BT2288 | BT-2288[1281]; | TR.AE | TUN | |
| BT2506 | BT-2506[1281]; | TR.AE | ||
| BT2549 | BT-2549[1281]; | TR.AE | ||
| BT44 | BT-44[1281]; | TR.AE | S | CHL |
| BT501 | BT-501[1281]; | TR.AE | S | MAR |
| BTY206 | BOUNTY-206[1281]; | TR.AE | ||
| BUB | BUBIA[1281]; | TR.DR | S | MEX |
| BHLA | BUCEPHALA[1281]; | TR.DR | S | MEX |
| BCHN | BUCHANAN[1281]; | TR.AE | USA | |
| BUCDMS | BUCJBUCK-DMS[1281]; | TR.AE | S | MEX |
| BBGL | BUCK-BAGUAL[1281]; | TR.AE | S | ARG |
| BCAT | BUCK-CATRIEL[1281][1765]; | TR.AE | S | ARG |
| BCHA | BUCK-CHARRUA[1281]; | TR.AE | S | ARG |