Volume 27, Issue 21, Pages R1152-R1153 (November 2017) Compass orientation drives naïve pelagic seabirds to cross mountain ranges  Ken Yoda, Takashi Yamamoto, Hirokazu Suzuki, Sakiko Matsumoto, Martina Müller, Maki Yamamoto  Current Biology  Volume 27, Issue 21, Pages R1152-R1153 (November 2017) DOI: 10.1016/j.cub.2017.09.009 Copyright © 2017 Elsevier Ltd Terms and Conditions

Figure 1 Migration activities by adults and fledglings of streaked shearwaters. (A) Southward migratory routes of two adult streaked shearwaters from Awashima Island, Japan (star), to the wintering areas (until December 31): the Tsugaru route (green points) and the Tsushima/Korea route (pink points). Adults flew around Honshu Island (Honshu is approximately 1300 km long), with discontinuous mountain ranges rising to several thousand meters. (B and C) Fledgling trajectory patterns of Bird #45 (circles) and #50 (squares) (B) and Bird #31 (circles) and #60 (squares) (C). Red triangles denote interpolated positions by 6 h. Pink color indicates elevation above 1000 m. Cross-sections of land elevation (m) between the two GPS positions that are 12-h apart are shown in the insets. (D) Migration paths of fledglings overlaid on wind data from satellite Advanced SCATterometer (METOP) on monthly mean vectors (November 2016). Strong easterly winds (>15 km h–1) in the south of the Tropic of Cancer (latitude ranging from 15° to 28°) affected migration. (E and F) Rose plot of track direction in the low wind region (E) and severe wind region (F). The orange arrows indicate concentrations (a measure of directionality) evaluated using Rayleigh tests. Current Biology 2017 27, R1152-R1153DOI: (10.1016/j.cub.2017.09.009) Copyright © 2017 Elsevier Ltd Terms and Conditions