The grasshopper-warblers, Locustella lanceolata and L. ochotensis, obtained at sea in the central Japan Sea
1964 Volume 4 Issue 1 Pages 55-57
Details
1964 Volume 4 Issue 1 Pages 55-57
In August 1963, Umitaka Maru, a training ship of University of Fisheries, made a research cruise in central Japan Sea. Birds and insects observed during this navigation were recorded with meteorological notes.
Twenty or thirty of Streaked Grasshopper Warblers Locustella lanceolata were encountered and one was obtained on August 21 in 36°54'N, 134°47'E and one Middendorff's Grasshopper Warbler L. ochotensis was captured on August 22 in 39°13'N, 135°02'E. On these days a low pressure storm of the maximum wind velocity 15m/s passed this sea area, causing strong NE winds at its front and accompanying heavy rains and SW winds south of it.
On both days, dragonflies, Pantala flavescens, also passed near the ship. Apparently, the storm had drifted these birds and dragonflies (which were otherwise found near the coast) to the central Japan Sea while they were migrating along the coast.
