The adrenal gland is a vital endocrine gland that secretes many important hormones in the daily life of birds. It is located in the Iraqi Pterocles alchata bird on both sides of the aorta in the front and side of the cranial lobe of the kidney at the caudal end of the lungs, triangular shape with a creamy yellow color. The statistical analysis showed no significant differences between the weight and length of the right and left glands. Histologically the gland of the sandgrouse bird capsule contains autonomic nodes consisting of nerve cells and the average thickness of the capsule is 42.69±1.81μm, the parenchyma of the gland is divided into two areas; the cortex and medulla in addition to the blood sinuses. The cortex area is divided into an area under the capsule and the central area, the cortex areas are made up of columnar cells with small nuclei and acidophilic cytoplasm, while the medulla area has appeared in the form of small irregular islands or an intertwined network between the cortical tissues and the tissues under the capsule and are concentrated near the blood sinuses and polygonal cells with a basicity cytoplasm and a large, spherical central nucleus containing two or more nucleoli. The statistical analysis showed significant differences in the average diameters of the adrenal parenchyma nuclei. Histochemical tests showed a strong interaction of the components of the capsule and the gland parenchyma with Periodic acid Schiff, Periodic acid Schiff & Alcian blue compound, Verhoeff and Masson’s stains.
