A Morphometric Study On The Wing Of Eurasian Teal (Anas Crecca)

Primary feathers are the major part of that provide the thrust of the Aves flight,the proportion of inside and outside section of feather and geometrical shapes of wingtip are closely related to the thrust。 Heavier the individual weight of the aves is, more changes that the thrust of Primary feathers providing has。The purpose of our study is to discover the relation of the geometric parameter of all the parts of the wing and the change of individual weight of the intraspecific by measuring the geometric parameter of all the parts of the wing and using the software of SPSS to analysis the dates，The results show that:1. Heavier the individual weight is， larger the other geometric parameters of the wing are, but the area of inside section of principal feather, and it reflects a linear relation, especially wingspan and wrist-petiole area are most obvious. It shows that heavier the individual weight is, larger the ability of air-staying the wingspan can provide and the formation of shoulder-wrist area is related to the primary feathers, larger the proportion of shoulder-wrist area increases, bigger the climbing power primary feathers can provide.2. It is only that principal feather has a negative correlation relation with individual weight, it is due to that the major function of the principal feather shows in the wing section, it shows that less and narrower the laminated structure is, bigger the bending resistance and resisting compression is. So it asks for that intension and shape is stricter than the other flight feathers, because the major function of the other flight feathers is providing dynamic, so its weight goes up with individual weight expanding.3. Wrist-shoulder part is larger with the individual weight. Wrist-shoulder part could provide the most climbing power of the total. Longer the length of wrist-shoulder part is, bigger the providing climbing power is, and wider the width is, more obvious the impact of the aves to keep the climbing power of the flight and reduce the resistance of the air is.4. Wingtip shape has enormous implications for the flight of the aves. The difference between point wingtip and roundness wingtip for the flight performance of the aves is so obvious. The length and proportion of principal feather in primary feathers are the major factor of the formation of the wingtip shape.