| Species of Bird | # Eggs | Incubation Time |
Time to fledge |
| Common Firecrest (Regulus ignicapillus) | 7 – 12 | 15 days | 10 days |
| Firecrest Kinglet (Regulus goodfellowi) | ? | ? | ? |
| Golden-crowned Kinglet (Regulus satrapa) | 8 – 11 | 14-15 days | 14 – 19 days |
| Goldcrest Kinglet (Regulus regulus) | 10 – 12 | 15 days | 15 – 16 days |
| Madeira Firecrest (Regulus madeirensis) | 7 | 15 days | 20 days |
| Ruby-crowned Kinglet (Regulus calendula) | 5-12 | 12 days | 16 days |
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