Data and R-code from: Migration, habitat and hunting style do not affect the malar stripe of different falcon species

The solar glare hypothesis suggests that malar stripe of a falcon decreases the sun’s glare in the eye, possibly increasing their hunting success. The amount of sunlight an individual experiences could be affected by its migratory strategy, hunting strategy, or main habitat. However, it is not known if these environmental variables impact the size and intensity of the malar stripe. Therefore, this study aimed to analyse differences in size and intensity of malar stripes between individuals of twelve falcon species with different migratory strategies, habitats, and hunting styles distributed worldwide. The malar stripes of twelve falcon species were measured and scored using more than 6000 photos from citizen science repositories. The measurements of the malar stripes were first reduced with a principal component analysis (PCA) and then analysed using a linear mixed model that included migratory strategy, habitat, and hunting style as fixed factors and several posture variables as random..., For this study, we compared the malar stripes of 12 falcon species with differing migratory strategies  (migratory, partially migratory, and sedentary), habitats (grassland, woodland, shrubland and forest), and hunting styles (aerial, insessorial and generalist). We used two online citizen science repositories, iNaturalist (iNaturalist, n.d.) and the Macaulay Library (Macaulay Library, n.d.), to get access to photos of the 12 different falcon species. Table 1. The 12 falcon species included in this study with their migratory strategy, habitat, and hunting style. Scientific name English name Migratory strategy Habitat* Hunting style Falco amurensis Amur Falcon Migratory Grassland Insessorial Falco columbarius Merlin Migratory Woodland Aerial Falco naumanni Lesser Kestrel Migratory Grassland Generalist Falco subbuteo Eurasian Hobby Migratory Woodland Aerial Falco cenchroides Australian Kestrel Partially Migratory W..., , # Data and R-code from: Migration, habitat and hunting style do not affect the malar stripe of different falcon species [https://doi.org/10.5061/dryad.cc2fqz6gg](https://doi.org/10.5061/dryad.cc2fqz6gg) ## Description of the data and file structure ### Files and variables #### File: dat\_total.csv **Description:** Measurements and scores for different aspects of the malar stripe for 12 falcon species. ##### Variables * ID: unique identifier for each photo * Library: online citizen science repositories * Eye_width_1: First measurement of eye width on the picture (in centimeters, cm hereafter) * Eye_width_2: Second measurement of eye width on the picture (cm) * Eye_width_3: Third measurement of eye width on the picture (cm) * Eye_heigth_1: First measurement of eye height on the picture (cm) * Eye_heigth_2: Second measurement of eye height on the picture (cm) * Eye_heigth_3: Third measurement of eye height on the picture (cm) * Width_template: Score of malar stripe width based on th...太阳光眩光假说（Solar Glare Hypothesis）认为，隼的颊纹（malar stripe）可减少眼部受到的太阳光眩光，或可提升其狩猎成功率。个体所承受的日照时长可能受其迁徙策略、狩猎策略或主要栖息环境的影响。然而目前尚不清楚这些环境变量是否会对颊纹的大小和强度产生影响。因此，本研究旨在分析全球范围内12种具有不同迁徙策略、栖息环境与狩猎方式的隼类个体间颊纹大小与强度的差异。研究人员通过公民科学数据库（citizen science repositories）中超过6000张照片，对12种隼类的颊纹进行了测量与评分。颊纹测量数据首先通过主成分分析（PCA）进行降维，随后采用线性混合模型进行分析，模型以迁徙策略、栖息环境与狩猎方式作为固定因子，并将若干姿态变量作为随机因子……本研究对比了12种隼类的颊纹，这些隼类具有不同的迁徙策略（迁徙型、部分迁徙型与定居型）、栖息环境（草原、林地、灌丛与森林）以及狩猎方式（空中捕食、栖止捕食与广食性捕食）。我们通过两个在线公民科学数据库——iNaturalist（iNaturalist，未注明日期）与麦考利图书馆（Macaulay Library，未注明日期）——获取了这12种隼类的相关照片。 表1. 本研究纳入的12种隼类及其迁徙策略、栖息环境与狩猎方式。 | 学名 | 英文名 | 迁徙策略 | 栖息环境* | 狩猎方式 | |------|--------|----------|-----------|----------| | Falco amurensis | 阿穆尔隼（Amur Falcon） | 迁徙型 | 草原 | 栖止捕食 | | Falco columbarius | 灰背隼（Merlin） | 迁徙型 | 林地 | 空中捕食 | | Falco naumanni | 黄爪隼（Lesser Kestrel） | 迁徙型 | 草原 | 广食性捕食 | | Falco subbuteo | 燕隼（Eurasian Hobby） | 迁徙型 | 林地 | 空中捕食 | | Falco cenchroides | 澳洲红隼（Australian Kestrel） | 部分迁徙型 | …… | …… | # 数据与R代码来源：《迁徙、栖息环境与狩猎方式并不影响不同隼类的颊纹》 https://doi.org/10.5061/dryad.cc2fqz6gg ## 数据与文件结构 ### 文件与变量 #### 文件：dat_total.csv **描述：** 12种隼类颊纹不同维度的测量值与评分。 ##### 变量 * ID：每张照片的唯一标识符 * Library：在线公民科学数据库名称 * Eye_width_1：照片中眼宽的首次测量值（单位：厘米，后文简称cm） * Eye_width_2：照片中眼宽的第二次测量值（单位：cm） * Eye_width_3：照片中眼宽的第三次测量值（单位：cm） * Eye_heigth_1：照片中眼高的首次测量值（单位：厘米，后文简称cm） * Eye_heigth_2：照片中眼高的第二次测量值（单位：cm） * Eye_heigth_3：照片中眼高的第三次测量值（单位：cm） * Width_template：基于……的颊纹宽度评分