Ornithopters are not very common versu fixed and rotary wing birds one of the main reasons for which is their aerodynamic complexity. Therefore, less research has been done on them than on fixed and rotating wing birds. fixed and rotating birds have a serious problem with miniaturization, that problem, this is that the Reynolds number shrinks as the wings shrink. This results in reduced aerodynamic performance. A flapping bird can have a combination of the useful features of the other two birds while not having their negative characteristics. This project first gives a complete description of these birds, and then outlines a general conceptual design for them. It is noteworthy that despite all the research done on flapping wings, the exact method for designing these birds has not been elaborated so far and is often based on statistical and trial and error methods. Here, it is attempted to formulate important quantities such as wing dimensions and geometrical parameters, as well as flight frequency and important flight angles, using scientific methods and dynamic equation extraction. Then, with xflre5 analytical software, several types of suitable airfoils were analyzed and finally a suitable airfoil was selected. Since the bird being analyzed has a non-rigid wing, a suitable mechanism for flapping is proposed and then a complete kinematic analysis is performed on it. Since the Delaurier method has been applied to rigid wing in flapping wings so far, the project has been used for aerodynamic analysis of the non-rigid wing. By calculating the aerodynamic forces generated by the flapping wing, a dynamic analysis of the mechanism is performed to determine the amount of power and torque needed to move the mechanism. At the end, all the components of this bird are designed by CATIA software and have been optimized many times for their final dimensions and shape. The last phase of this project was the process of constructing this flapping wing that was successfully completed and its flight testing completed the last loop of the project's chain. Keywords: Flapping wings, non-rigid wings, wing mechanism design, lift coefficient, drag