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Index of Subjects --Apple-Mail-5--463704088 Content-Type: text/plain; charset=WINDOWS-1252; format=flowed; delsp=yes Content-Transfer-Encoding: quoted-printable This is a good example of GW hysteria by the mainstream media, in this =20= case by the highly unreliable Reuters. The article is pure =20 speculation. It also ignores the fact that the Earth was warmer just =20= 7,000 years ago, and colder during the Little Ice Age, and warblers =20 seem to have made it through those changes just fine. The principle problem for birds migrating between Europe and Africa, =20 like those described in the article, is loss of habitat (particularly =20= in Africa). It is also generally true that the bigger the bird, the =20 more likely it is to be pestered by humans: chased, shot, eaten, &c. The conversion of temperature into an equivalent surface distance =20 needed for migration assumes that temperature is the main control of =20 bird migration, which almost everyone who has studied the subject =20 knows is just not true. Food is the main motive for migration, and =20 the food needs vary according to species. Birds will put up with a =20 wide range of temperatures, if the food is available. That is the =20 reason so many feeder-species have moved north, and now stay longer in =20= the winter: if the food is adequate, they will stay. It is one of the =20= amazing things we observe: tiny little creatures, out in the cold, =20 with nothing but a thin layer of puffed-out feathers to separate them =20=
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