Red-winged Blackbird 紅翼- 黒鳥In Minnesota they arrive early in the spring and leave early in fall  初春に訪れ、初秋に去ります 

Red-winged Blackbird Photo:  1 A Male Making calls |  2a / 2b  Male #2  |  3a / 3b Male #3    紅翼- 黒鳥

Male's Territorial Calls  March 21, 2009  Male Red-winged Blackbirds arrive early to claim breeding territories. Take human voices in the park for granted.


Red-winged blackbirds are extremely polygynous ... 極端な一夫多妻: 一羽の雄が、多いときには、15羽の雌、平均で、5羽の雌。Fore more info on Red-Winged Blackbirds, click here. This is interesting because almost all birds are monogamy according to this article.  monogamy vs. polygyny

 

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