Abstract: The studies on the time sequence of the morning songs of birds showed that birds had a fixed time order on the morning songs during a certain period in spring.The time order patterns would be different in different periods of spring because of the changes of the bird's breeding behavior.Asignificant relationship between the time of first sound in the morning and the weather condition was be also found through this study.

Key words: Monocrotophos, Sciaenops ocellatus, Na⁺/K⁺-ATPase, Microstructure, Ultrastructure