奥马哈的内布拉斯加大学每年进行松鼠人口普查,注意到黑松鼠的增多。 University of Nebraska at Omaha conducts annual squirrel census, noting rise in black squirrels.

奥马哈的内布拉斯加大学每年进行一次松鼠普查,由James Wilson教授领导,学生们在奥马哈地区数松鼠。 The University of Nebraska at Omaha conducts an annual squirrel census led by Professor James Wilson, where students count squirrels across the Omaha area. 这项研究显示,黑松鼠由于基因突变导致梅拉宁含量高而成,其数量在增加,向西扩展。 This research has shown that black squirrels, caused by a genetic mutation leading to high melanin, have grown in number and expanded westward. 这项研究为学生提供了宝贵的实地经验和对松鼠人口动态的深入了解。 The study provides valuable field experience for students and insights into squirrel population dynamics.