Birds respire through lungs (pulmonary respiration). The lungs have air sacs which help in double respiration and act as internal cooling agents. Sound producing organ is syrinx (at the base of trachea) and larynx has no vocal cords.
Birds respire through lungs (pulmonary respiration). The lungs have air sacs which help in double respiration and act as internal cooling agents. Sound producing organ is syrinx (at the base of trachea) and larynx has no vocal cords.