Approximate Hatch Weights:
~1.5-1.8g at hatching
~2.7g by 1 day old
~8.6g by 4 days old
~10.9g by 5 days old
~12.5g by 6 days old
Order: Passeriformes
Family: Vireonidae
Common Name: Vireos
Region: Eastern
Chick Type: Altricial
Down: Sparse gray down
Skin Color: Yellowish
Bill: Straight and yellowish to brown
Foot Type: Anisodactyl
Gape: Orange-yellow
Gape Flanges: Cream-colored
Iris: Dark brown
Legs and Feet: Pink to gray legs and feet
Video from Tufts Wildlife Clinic
Video from Tufts Wildlife Clinic
~1st Week
![](https://sites.tufts.edu/babybirds/files/2018/04/IMG_1014.JPG.jpg)
Photo by Jessica Zorge, Tufts Wildlife Clinic
~1st Week
![](https://sites.tufts.edu/babybirds/files/2018/04/IMG_1012.JPG.jpg)
Photo by Jessica Zorge, Tufts Wildlife Clinic
~1st Week
![](https://sites.tufts.edu/babybirds/files/2018/04/IMG_1013.JPG.jpg)
Photo by Jessica Zorge, Tufts Wildlife Clinic
~1st Week
![](https://sites.tufts.edu/babybirds/files/2018/06/IMG_3528.jpg)
Photo by Brenda Varvarigos
6 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34117313_1864316317194948_5168845359501279232_o.jpg)
Photo by Connie Black
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/04/IMG_2958.jpg)
Photo by Brenda Varvarigos
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/04/IMG_2959.jpg)
Photo by Brenda Varvarigos
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/07/35850806_10157471684894128_3221420996091183104_n.jpg)
Photo by Nikki Becich, Avian Conservation Center of Appalachia
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/07/35972616_10157471685229128_6646892168973647872_n.jpg)
Photo by Nikki Becich, Avian Conservation Center of Appalachia
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/07/36002861_10157471685059128_1449908988362620928_n.jpg)
Photo by Nikki Becich, Avian Conservation Center of Appalachia
~2nd Week - 12g
![](https://sites.tufts.edu/babybirds/files/2019/06/fullsizeoutput_4010.jpeg)
Photo from Tufts Wildlife Clinic, grid squares = 1 inch
~2nd Week - 12g
![](https://sites.tufts.edu/babybirds/files/2019/06/fullsizeoutput_400b.jpeg)
Photo from Tufts Wildlife Clinic, grid squares = 1 inch
~2nd Week - 12g
![](https://sites.tufts.edu/babybirds/files/2019/06/fullsizeoutput_400e.jpeg)
Photo from Tufts Wildlife Clinic, grid squares = 1 inch
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2018/04/IMG_3686.jpg)
Photo by Brenda Varvarigos
12 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34102768_1864316467194933_4810365823946326016_o.jpg)
Photo by Connie Black
13 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34258777_1864316527194927_8610339839889375232_o.jpg)
Photo by Connie Black
14 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34258927_1864316587194921_2703159842377302016_o.jpg)
Photo by Connie Black
~2nd Week
![](https://sites.tufts.edu/babybirds/files/2023/03/IMG_0046.jpg)
Photo from the Wildlife Center of Virginia
15 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34135718_1864316853861561_4760849008551788544_o.jpg)
Photo by Connie Black
17 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34370742_1864316903861556_6734041986031943680_o.jpg)
Photo by Connie Black
18 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34165034_1864316660528247_3372952037909069824_o.jpg)
Photo by Connie Black
19 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34085750_1864317057194874_2585054731432886272_o.jpg)
Photo by Connie Black
19 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34318311_1864316993861547_3358888420901388288_o.jpg)
Photo by Connie Black
26 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34092947_1864316837194896_4263834100273512448_n.jpg)
Photo by Connie Black
31 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34199491_1864317107194869_1337666572201754624_o.jpg)
Photo by Connie Black
31 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34133068_1864316707194909_3416981908028915712_n.jpg)
Photo by Connie Black
32 Days Old
![](https://sites.tufts.edu/babybirds/files/2018/06/34092197_1864316580528255_3520867739465940992_n.jpg)
Photo by Connie Black