AVIS-IBIS

Birds of Indian Subcontinent

VISIBLE MIGRATION THROUGH THE PYRENEES: AN AUTUMN RECONNAISSANCE.

Publication Type:Journal Article
Year of Publication:1953
Authors:Lack, Dand Elizab
Journal:Ibis
Volume:95
Issue:2
Date Published:1953
ISBN Number:1474-919X
Keywords:Columba palumbus, Cyanistes, Cyanistes caeruleus, France, Fringilla, Fringilla coelebs, Fringillidae, Gruidae, Grus, Grus grus, Hirundinidae, Hirundo, Hirundo rustica, Motacillidae, Paridae, Parus caeruleus, Passer montanus
Abstract:SUMMARY.* 1Our present findings are preliminary. * 2On the southwest corner of France round St. Jean de Luz four migratory streams were found: (i) Blue Tits and Tree Sparrows travelling west, (ii) Chaffinches travelling S.W. by W., (iii) cardueline finches, some Chaffinches, Motacillidae, Wood Pigeons and Cranes travelling S.S.W., and (iv) Skylarks and Motacillidae, also grey geese, arriving from the Bay of Biscay and continuing inland south. * 3The birds in the above groups (iii) and (iv) were seen crossing the low mountaiiis of the Basses Pyrenees in large numbers. With a cross wind the small passerincs selected the windward slopes, presumably because of the updraught. * 4Kaptors, pigeons, hirundines, finches and Motacillidae were seen migrating through the high mountains of the central Pyrenees. In certain conditions all these groups (as well as three orders of insects) could be found migrating through the Port de Gavarnie at 7500 feet. * 5In the high mountains, hirundines (nearly all of which were Swallows) flea high on a broad front with a following wind, when they ignored the contours, somewhat lower with a cross wind, when they selected the windward slopes, and very low with a head wind, or in rain, or in the early morning and late evening, when they followed the valleys. * 6Finches and Motacillidae likewise migrated well above the floor of the vallejs except in bad weather or in the early morning. Most passed through the Port de Gavarnie in the middle hours of the day, not (as on the coast) in the early morning. * 7Other published records also indicate that small passerine birds regularly cross the European mountain ranges on their migration.
URL:http://dx.doi.org/10.1111/j.1474-919X.1953.tb00689.x
Short Title:Ibis
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith