Se comprobó el estado nutricional y se realizaron las medidas con buche y estómago vacíos.
The nutritional status was checked and measurements were performed with an empty stomach and cheek.
Ambos sexos alimentan a sus crías con una secreción muy nutritiva denominada leche del buche, que se segrega por células especiales.
Both sexes feed their offspring with a very nutritious secretion called milk of the crop, which is segregated by special cells.
El aparato digestivo de las aves es único, con un buche para almacenamiento de lo ingerido y una molleja que contiene piedras que el ave ha tragado y que sirven para triturar el alimento para compensar la ausencia de dientes.
The digestive tract of birds is unique, with a crop for ingestion and a gizzard containing stones that the bird has swallowed and which serve to crush the food to compensate for the absence of teeth.
