. The book of birds, common birds of town and country and American game birds . MAI SHOWING SUMMER AND WINTER HOMES OF THE MIKD THAT HATES DARKNESS The summer linme of tite Arctic tern is along the Arctic coast of North America; itswinter home witliin the Antarctic Circle, miles away. During eight months of the yearthe bird lives where the sun does not go l»eIow the liorizon. The track oi the tern in itsround journey of _J.(K)0 miles is unknown (see i»age lOo). 191 192 OUR GREATEST TRAA^ELERS. THE ROBIN MOVES MUCH QUICKER ON THE PACIFIC THAN ON THE ATEANTIC line . iHe -^i^S ^r
. The book of birds, common birds of town and country and American game birds . MAI SHOWING SUMMER AND WINTER HOMES OF THE MIKD THAT HATES DARKNESS The summer linme of tite Arctic tern is along the Arctic coast of North America; itswinter home witliin the Antarctic Circle, miles away. During eight months of the yearthe bird lives where the sun does not go l»eIow the liorizon. The track oi the tern in itsround journey of _J.(K)0 miles is unknown (see i»age lOo). 191 192 OUR GREATEST TRAA^ELERS. THE ROBIN MOVES MUCH QUICKER ON THE PACIFIC THAN ON THE ATEANTIC line . iHe -^i^S ^r^/Jl^^SSJI^ll^^-^S^SrclS^^^^ OLFR GREATEST TRAVELERS 193 the ice - masses in Lake Superior andHudson Bay. To the northwest stretchesa less forbidchng region, ah-eady (|uici<-ening under the iufhKnce of the Chinookwinds. THE KASTERN ROBINS MOVE SLOWEV, THEPACIFIC MUCH EASTER Most of the robins from Missouri tliatpass throujjh western Minnesota elect toturn to the northwest, and now theymust not only keep pace with the rapidlyadvancing season, but must do so whiletraveling on a long-drawn-out daily average rises to 50 miles—four times that in southern Iowa—andlater, when for the birds bound for west-ern Alaska the course becomes nearlydue west, the rate increases to 70 milesa day—more than six times the speedwith which the journey began. The migration map of the robins showsthat these Alaska-breeding birds are theonly ones that develop high speed. Therobins bovmd for Xewf
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Keywords: ., bookauthorfuer, bookcentury1900, bookdecade1910, booksubjectbirds
