29 genera are assigned to the class AVES
| Order | Genus | FOP | FOS | LOP | LOS |
|---|
| CHARADRIIFORMES | Anatalavis | K | Maes | K | Maes |
| CHARADRIIFORMES | Graculavus | K | Maes | K | Maes |
| CHARADRIIFORMES | Laornis | K | Maes | K | Maes |
| CHARADRIIFORMES | Larus | T | Mi-l-l | T | Mi-l-l |
| CHARADRIIFORMES | Palaeotringa | K | Maes | K | Maes |
| CHARADRIIFORMES | Petralca | T | Ol-u | T | Ol-u |
| CHARADRIIFORMES | Phalaropus | T | Plio | R | |
| CHARADRIIFORMES | Stercorarius | T | Mi-m | R | |
| CHARADRIIFORMES | Telmatornis | K | Maes | K | Maes |
| HESPERORNITHIFORMES | Baptornis | K | Sant | K | Maes |
| HESPERORNITHIFORMES | Enaliornis | K | Albi-u | K | Ceno |
| HESPERORNITHIFORMES | Hesperornis | K | Sant | K | Camp-l |
| HESPERORNITHIFORMES | Parahesperornis | K | Sant | K | Sant |
| ICHTHORNITHIFORMES | Apatornis | K | Coni | K | Coni |
| ICHTHORNITHIFORMES | Ichthyornis | K | Turo | K | Camp |
| ICHTHORNITHIFORMES | Palintropus | K | Maes | K | Maes |
| INCERTAE SEDIS | Scanirnis | T | Dani | T | Dani |
| PELECANIFORMES | Empheresula | T | Ol-u | T | Ol-u |
| PELECANIFORMES | Phocavis | T | Eo-u | T | Mi-m |
| PELECANIFORMES | Prophaethon | T | Eo-l | T | Eo-l |
| PELECANIFORMES | Pseudodontornis | T | Than | T | Plio |
| PELECANIFORMES | Sula | T | Ol-l | R | |
| PROCELLARIIFORMES | Diomedeoides | T | Ol-l | T | Ol-l |
| PROCELLARIIFORMES | Eopuffinus | T | Than | T | Ol-l |
| PROCELLARIIFORMES | incertae sedis | T | Eo-u | T | Eo-u |
| PROCELLARIIFORMES | Oceanodroma | T | Mi-u | T | Mi-u |
| PROCELLARIIFORMES | Pelecanoides | T | Plio | R | |
| PROCELLARIIFORMES | Tytthostonyx | K | Maes | K | Maes |
| SPHENISCIFORMES | Pachdyptes | T | Eo-u | T | Eo-u |
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FOP = Period of first occurrence
FOS = Stage of first occurrence
LOP = Period of last occurrence
LOS = Stage of last occurrence
Stage abbreviations follow Sepkoski (2002).