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CALIFORNIA WATER BIRDS.— No. IV.^ 



Vicinity of Monterey in Autumn. 

 by leverett m. loomis, 



Curator of the Department of Ornithology. 



CONTENTS. 



Plate XV. 

 I. Introduction. 

 II. Migration. 



Page. 



1. Calendar ,• 278 



September 18 to Novetnber 14 278 



Summary of Southward Movements 301 



2. Conclusions 303 



Migration Northward after Breeding Season 303 



Mtgratio7i from, South Temperate Zone 303 



Migration from Subtropics and Tropics 305 



Guidance by Physical Phenomena 307 



Guidance by Old Birds 309 



Cause of Migration 312 



Winter with Its Failure of Food 313 



Inheritance 315 



Education 315 



Habit 315 



Summary 316 



III, List of Species. 



I. INTRODUCTION. 



To BRIDGE the gap between my summer and winter 

 observations, I resumed the study of the water birds off 

 the Monterey coast September 18, 1896, and for nearly 

 two months, with but slight interruption, made week-day 



1 'No. I.— Monterey and Vicinity from the Middle of June to the Knd of August,' 

 Proc. Calif. Acad. Sci., 2nd Ser., Vol. V, June 19, 1895, pp. 177-224, i map. 



'No. II. — Vicinity of Monterey in Midwinter,' ibid.. Vol. VI, Feb. 21, 1896, pp. 1-30, 



1 map. 



'No. III.— South Farallon Island in July,' ibid., Vol. VI, Aug. 29, 1896, pp. 353-?66, 



2 maps. 



[ 277 ] February 8, 1900, 



MAR 22190^ 



