Table 3. Estimated body masses of fossil birds from Changma.
| Species | Humeral length (mm) | Tibiotarsal width (mm) | Estimated weight (g) |
|---|---|---|---|
| Ornithuromorphs | |||
| Gansus yumenensis | |||
| CAGS-IG-04-CM-001 | ? | 2.5 | ?/124.8 |
| CAGS-IG-04-CM-002 | ? | 2.7 | ?/147.4 |
| CAGS-IG-04-CM-003 | 48.5 | 3.0 | 144.2/185.0 |
| CAGS-IG-04-CM-004 | 48.0 | ? | 141.7/? |
| GSGM-05-CM-014 | 47.8 | 2.7 | 140.6/147.4 |
| Mean weight | 142.2/142.9 | ||
| Yumenornis huangi | 49.9 | ? | 151.5/? |
| Changmaornis houi | ? | 2.9 | ?/172.0 |
| Enantiornithines | |||
| Qiliania graffini | |||
| GSGM-05-CM-006 | ? | 1.3 | ?/30.4 |
| GSGM-04-CM-006 | ? | 1.31 | ?/30.9 |
| Mean weight | ?/30.7 | ||
| CAGS-IG-04-CM-007 | ? | 1.7 | ?/54.3 |
| CAGS-IG-02-0901 | 47.7 | ? | 140.1/? |
| GSGM-05-CM-068 | ? | 1.9 | ?/69.0 |
| GSGM-05-CM-012 | ? | 2.0 | ?/77.0 |