Approximate Hatch Weights:
~14g at hatching
~ 20g by 1 day old
~34g by 3 days old
~46g by 4 days old
~69g by 6 days old
~94g by 8 days old
~132g by 11 days old
~154g by 14 days old
~174g by 16 days old
~255g by 24 days old
~340g by 60 days old
Order: Cuculiformes
Family: Cuculidae
Common Name: Cuckoos
Region: Western
Chick Type: Altricial
Down: Sparse white down
Skin Color: Black
Bill: Long and straight and black
Foot Type: Zygodactyl
Gape: Red-pink
Gape Flanges: White to pale pink
Iris: Dark brown
Legs and Feet: Gray to black legs and feet
Just Hatched
![](https://sites.tufts.edu/babybirds/files/2019/03/fullsizeoutput_2fca.jpeg)
Photo by Ruth Plenty, Harmony and Hope Horse Haven
Just Hatched
![](https://sites.tufts.edu/babybirds/files/2019/03/fullsizeoutput_2fcb.jpeg)
Photo by Ruth Plenty, Harmony and Hope Horse Haven
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/05/21215845_10155242727913347_700630414_o.jpg)
Photo by Ingrid Hodel, WildCare Oklahoma
~3rd Week
![](https://sites.tufts.edu/babybirds/files/2018/05/IMG_0422.jpg)
Photo from WildCare Oklahoma
~3rd Week
![](https://sites.tufts.edu/babybirds/files/2020/01/fullsizeoutput_4dc6.jpeg)
Photo by Laura Kintz, WildCare Oklahoma
~3rd Week
![](https://sites.tufts.edu/babybirds/files/2020/01/fullsizeoutput_4dc9.jpeg)
Photo by Laura Kintz, WildCare Oklahoma
>4 Weeks
![](https://sites.tufts.edu/babybirds/files/2018/09/41340181_1854892741285087_4918569252862033920_n.jpg)
Photo by Kevin Shepherd, WildCare Oklahoma
>4 Weeks
![](https://sites.tufts.edu/babybirds/files/2018/09/Roadrunner.jpg)
Photo from WildCare Oklahoma