what is the source of body warmth of bird
Bird
bird is the word
it's the chaffinch!
what is the source of body warmth of bird
gizzard
crop or gizzard
A gizzard is a muscular organ inside a bird that grinds up food.
malpighian tubule By Kayihura Gael.
eclipse
It brings the bird into a condition suitable for breeding.
Raid weight gain