WTINUING THE COYSTERY that ornitholo- BIRDS NAV)F HOW LTE se that! I do eally have b at night, and in ven now we hawf navigation. E atcher at Wash how the birds do inderstanding of pnsin, estimated filosopher Al istotle The Greek ph migration birds It was not u for the winter butns disappeared 1 pint of observa- gists began to ru hat robins turn in nd concluded tl h reports awak- enormous num Home robins againutumn and be the 18th century oblem involved burn Observato uralist, endorsed le Roman nate that birds do fly Boston. bers. In 1898 a bird w to sleep again, that at the hehere on June 4. 1952 Surse, is birds' passed across hile our top physicis ry in Madison, Wisciate days later, W t interstellar space, tloht of the autumnal her the trackiver since Noah ened scientists gift which has tion at the rate miles across field have been trying to fithe njeht sky at his ne gate right here on earth. How, for example, does an While bly the world's have been collected for the Arctic tern, born within ten degrees of the North last centu established by the last 25 years that a de- Pole, leaving home at the age of six weeks, find his termined nx shearwater. made to find out how the way to the antarctic pack ice 11,000 miles. We birds do il a cliff on they steer by The North Star! and, al back to the m there.." another hereditary ne The sun? aken by air to e winds? The climate? The northerwoodpecker Ne for d employed by man elis carth's magnetism? What gives them their sense of eart as well below his qual over the waters. Probah, direction? jut how but did not fl brain the way home was 'Astep toward real understanding of bird navigaation nights later the hu like bird called a Mais tion was taken by a German ornithologist named fyears empty hole a who devised a way of testing the The dcontest, probiught to have been invented in Irew cold but theasually at the turn of the century, he 12th evening retirc300 years later Columbus manwas very dark.hemselves by the sun. Noticing that ged to able to changntic. But birds had been cruis He squawkedop around restlessly when the time ne conil Almost all r the planet millions of years! bne twilight a fewion, he put some caged starlings in bars of natur trage mankind, but investigated the with windows through which only cages of their about this matter finally won the scen. He then madeland it bedesults in 19 when he spinion in Ron't any complete the woodpecker'e birds med and lows fumation by nithe theory fact that gave t woodpecker und in the direction the wild idea tould be del migrate. When he darkened this to dinked wild idea tould be detirection of the many birds, noticed that rob to the mall one suggested the sun durisht. They areedstarts did not their orientation and began the nathal evening, throughout tained as wine owning throughout tained as wing they are redstarts in the hermed an artificed mor body knice from thewith possibl't fly in the in spring. Pliny. had it rise and a bly bee has beco par pattern." time. The birds ariented the ment habits, and mm is general idea. but in a direction deten, was literally left out He thus established strong birds live and love Te's compulsions. The on tincts, fron