What food source exclusively sustains Yellowhammer nestlings for the initial few days after hatching?

Answer

Invertebrate prey

The earliest stage of life for a Yellowhammer chick necessitates the highest concentration of pure protein for rapid muscle and feather development. This critical need is met entirely by invertebrate prey provided by the parents immediately following hatching. This exclusive insect diet serves as the foundation for the nestling's growth. Only after this initial phase, around the third day, do the parents begin the gradual process of supplementing this high-protein intake with carbohydrate-rich cereal grains, preparing the young for their eventual adult diet.

What food source exclusively sustains Yellowhammer nestlings for the initial few days after hatching?
dietnutrition