| Red-crowned crane is the first-class protective birds of our country, and belong to rare birds in the world. At present, the extant numbers in the world are gradually decreasing, so the species is classified as one of the endangered birds, and obtained the priority conservation as endangered species of the world. The conservation for Red-crowned cranes had aroused universal concern, the protected areas main for protecting cranes had been built one after another in all the countries. At different angles and using different methods, many specialists and scientific workers had been researched and probed how to enlarge the total population of red-crowned cranes for saving the endangered species.The researches about breeding ecology of red-crowned cranes had been worked a lot and obtained many achievements too.Aimed at breeding behaviors of red-crowned cranes, this article developed the following researches:1 The superficial features of breeding behaviorBased on breeding ecology of red-crowned cranes, this article developed quantitative analysis and qualitative analysis for breeding behaviors of red-crowned cranes aimed at that the beginning time of sexual selection, the behavior process > time and frequency of mating, the process, time of nesting and egging and the numbers of egging, the time> process of hatching and territorial protection, breading out of eggs, brood and younger protection act. It gave the whole mating behavior model: male courtship > female selected* spouses > mating and mating end four stages, and probed the relation between courtship and mating, the ecologic significance of courtship and the standard of female selected spouses. During these, the stage of male courtship include malecourtship display and song; the stage of female selected spouses include dancing, antiphonal song and stretching wings for waiting; the stage of mating include male jumping on the back of female > choacoes connected with each other, antiphonal singing of both sexes, male jumping on the ground; the stage of mating end included antiphonal singing and dancing of both sexes. From courtship song beginning to jumping on the back of female, it spent 19~50 second, majority was 25 second or so; from male jumping on the back of female to jumping on the ground after mating finished, it spent 11-13 second; antiphonal singing and dancing continued 27-180 second, female was usually 27-50 second, male was usually 1 minute to 1 minute and 36 second. RC-1 spent a longer time on antiphonal dancing before mating and mating, but a shorter time antiphonal dancing and singing after mating; RC-2 spent a shorter time mating on mating and antiphonal singing after mating, but a longer time on antiphonal dancing and singing after mating. The time spent on mating for RC-3 was longer RC-2, but shorter RC-1, dancing before and after mating was between RC-1 and RC-2. So obtained the times spent on sexual selection were related with their recognized degree for each other, it was to say that sexual selection of cranes being familiar with each other and with mating experience would use less time, but younger cranes having not mating experience would spend more time on sexual selection.2 The vocal behavior of red-crowned cranes in breeding periodIn breeding period, mating behavior model of red-crowned crane could be divided into male courtship, female selected spouses, mating of both sexes and mating end four stages, their relevant vocal models were separately male courtship call, response call of female selected spouses and antiphonal song of both sexes, mating antiphonal singing and loud-antiphonal singing of both sexes. Different vocal behavior models were given from sound spectrum analysis for different songs. Based on rule sonagram, quantitative analysis and qualitative analysis, difference comparative analysis in and between individuals for different songs were developed, and obtained the sresuls were as follows:(1)Acoustic properties of male songs were that there were less syllables in every single calling song, it was usu...
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