Control Pigeons.

RS: release site, home direction and distance; Track: track code and individual pigeon code number are reported; Date: date of release; r and α: mean vector length and directions relative to the sections of tracks recorded in the first (1), the two first (2) and the three first (3) hours after release (see Material and methods for further explanations); ht: homing time expressed in hours and minutes; “day after”, the pigeon homed the day after the release, “later”, the bird homed in the subsequent days, “lost” the bird never homed; at, analysis of the tracks: A, track used in the single release statistical analysis and P used also in the pooled analysis; I, incomplete track which could not be used in the statistical analysis; NR the track was not recorded by the logger. Release from Bolgheri: five out of 11 C pigeons tested at Bolgheri had previously tested at Montespertoli (two former C, two former PA and one former AO). Release from Montespertoli: Six out of 11 C pigeons tested at Montespertoli had been previously released at Bolgheri (3 former C and 3 former AO).本数据集各字段说明如下：RS：释放位点（release site）、归向方位与归巢距离；Track：赛道编码与个体赛鸽编号均予以记录；Date：释放日期；r与α：分别代表释放后第1、前2、前3小时内记录的赛道片段的平均向量长度与方位（详细说明参见材料与方法部分）；ht：归巢时长，以小时和分钟为单位记录；其中"day after"指赛鸽于释放次日归巢，"later"指赛鸽于后续数日归巢，"lost"指赛鸽未归巢；at：赛道分析标记：A表示该赛道用于单次释放统计分析，P表示该赛道同时用于合并统计分析；I表示赛道不完整，无法用于统计分析；NR表示该赛道未被记录器（logger）记录。从博尔盖里（Bolgheri）释放的实验群体：在博尔盖里接受测试的11只C组赛鸽中，有5只此前曾在蒙特斯佩尔托利（Montespertoli）参与过测试（其中2只为既往C组，2只为既往PA组，1只为既往AO组）。从蒙特斯佩尔托利（Montespertoli）释放的实验群体：在蒙特斯佩尔托利接受测试的11只C组赛鸽中，有6只此前曾在博尔盖里接受过释放测试（其中3只为既往C组，3只为既往AO组）。