Grasshopper Sparrow (Ammodramus savannarum ammolegus) egg dimensions in Arizona 2013

Ammodramus savannarum ammolegus (commonly referred to as the Arizona Grasshopper Sparrow) occurs in the desert and plains grasslands of southeastern Arizona, southwestern New Mexico, and northern Sonora, Mexico. Although a subspecies of conservation concern, this data was produced as part of the first intensive study of its life history and breeding ecology, providing baseline data and facilitating comparisons with other North American Grasshopper Sparrow subspecies. This study is described in the publication listed in the larger work citation of this metadata record. In 2013, the dimensions (length and width) of 1–2 eggs were measured in a randomly selected subset of nests as soon after the nest was found as possible.

草原鹨雀鹀亚利桑那亚种（Ammodramus savannarum ammolegus，俗称亚利桑那草蜢雀）分布于美国亚利桑那州东南部、新墨西哥州西南部以及墨西哥索诺拉州北部的荒漠与平原草原生境。尽管该亚种属于受保护关注类群，本数据集源自针对其生活史与繁殖生态学的首次系统性深入研究，可为相关研究提供基准数据，并为与其他北美草蜢雀亚种的对比分析提供支撑。本研究的详细内容已刊载于本元数据记录的总参考文献列表中的出版物。2013年，研究人员在发现巢穴后第一时间，从随机选取的部分巢中选取1至2枚卵，测量其长宽尺寸。