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

Photo by Jessica Zorge, Tufts Wildlife Clinic
~1st Week

Photo by Jessica Zorge, Tufts Wildlife Clinic
~1st Week

Photo by Jessica Zorge, Tufts Wildlife Clinic
~1st Week

Photo by Brenda Varvarigos
6 Days Old

Photo by Connie Black
~2nd Week

Photo by Brenda Varvarigos
~2nd Week

Photo by Brenda Varvarigos
~2nd Week

Photo by Nikki Becich, Avian Conservation Center of Appalachia
~2nd Week

Photo by Nikki Becich, Avian Conservation Center of Appalachia
~2nd Week

Photo by Nikki Becich, Avian Conservation Center of Appalachia
~2nd Week - 12g

Photo from Tufts Wildlife Clinic, grid squares = 1 inch
~2nd Week - 12g

Photo from Tufts Wildlife Clinic, grid squares = 1 inch
~2nd Week - 12g

Photo from Tufts Wildlife Clinic, grid squares = 1 inch
~2nd Week

Photo by Brenda Varvarigos
12 Days Old

Photo by Connie Black
13 Days Old

Photo by Connie Black
14 Days Old

Photo by Connie Black
~2nd Week

Photo from the Wildlife Center of Virginia
15 Days Old

Photo by Connie Black
17 Days Old

Photo by Connie Black
18 Days Old

Photo by Connie Black
19 Days Old

Photo by Connie Black
19 Days Old

Photo by Connie Black
26 Days Old

Photo by Connie Black
31 Days Old

Photo by Connie Black
31 Days Old

Photo by Connie Black
32 Days Old

Photo by Connie Black