MIGRATION

OF. With the/ heavy exception of tropical varieties, most birds | man change their homes with the scasons. silve: Byen ee, apectes = me with m,| impo throughout, Such as tho sparrow, | 'mpo are now known Lionlavads from district to | exter district at certain fixed periods, so that the | Unir species is represented by different individ- | chart uals at different parts of the year. Tho/| ecien migratory babit is more easily observed in | and i those birds that spend one portion of the | Birm = in one country, and the remainder | p. 90 another having different climatic BE conditions. The cuckoo, the nightingale, | coast the swallows, and swifts arrive in England | Spai: in spring, spend the summer hero, and | work leaye again in the autumn, for warmer| to tl latitudes. Our winter visitors include} that woodcocks, field-fares, and many aquatic} eitior birds. These arrive from more northerly} BE regions, to which they acain return on the/|d. 19 = of warmer weather, In all cases | phila ® young birds arerearedin thosccountrics | twen! where the summer is spent. Some y pero tinuo as the swallows, migrate in largo flocks; | done others in straggling groupe 5 and, in the| of m northward ae the male birds frequently | lady travel first. e departure and arrival of | Socie the flocks take place with such niin ica,” that the dates may be fixed beforehand. } Islan: As the day for departure approaches, the | Japa: birds a emble in certain localities from all} BE or of the ae he In their flight they | Woki certain well Seem ene Oke the sc ing thesameroute. In cro ing the North | comp Sea, it has been observed that the route is | incre: not the shortest po ible, but is over | shoot a series of shallows. The flight is usually | the. mado against the wind, and somo species | The are known to delay their departure for)" Kir a few days, if the direction of the wind is | £250. unfavourable. The majority go north to| BE breed. haus BIRETTA, « four-cornered oe worn by | was the clergy of the Roman Catholic Church, | times and by some in the English Ohurch. | when The Dbiretta worn by priests is black, by} Pra bishops purple, and by cardinals red. stron ‘ BIREBECK, [s. 72] Jack's Reference Book — A Dictionary of General Information bÖLÜM I: A Dictionary of General Information