106 



INDEX. 



Accipiter nisus 



Alauda arvensis 



Alee do ispida 



American yellow - bellied 



wood-pecker, change in 



food habits 

 "Avian Rat" 



B 



PAGE 



66 



59 

 ii 



3 

 32 



Barn Owl, 61 ; post-mortem 

 records, 62 ; examination 

 of pellets, 62,63; conclu- 

 sion 



Bibliography 



Bird Sanctuaries ... 



Birds and agriculture, i ; 

 alteration of environment, 



1 ; and animal pests, i ; 

 change in food habits, 2 ; 

 as destroyers of weed 

 seeds, 71 ; as distributers 

 of weed seeds, 71 ; eco- 

 nomic importance of, 9 ; 

 establishment of orchards, 



2 ; facilities for nesting, 

 2 ; failure of natural food 

 supply, I ; majority of 

 species beneficial, 3 ; num- 

 ber of British, 4 ; number 

 examined, 14; planting of 

 fruit trees, 2 ; species ex- 

 amined, 14 ; undue in- 

 crease of, 10 ; wholesale 

 destruction of.unsound, 9; 

 in relation to forestry ... 



Birds of Prey 



Blackbird, 19 ; post-mortem 

 records, 19 ; field obser- 

 vations, 20 ; food of nest- 

 lings, 20 ; examination of 

 faeces, 20 ; number 

 trapped, 19 ; conclusion, 

 21 ; change in food habits 



63 

 93 

 90 



PAGE 



Blackcap, 22 ; post-mortem 

 records, 22 ; field observa- 

 tions, 23; food of nestlings, 

 23; conclusion, 23; change 

 in food habits ... ... 2 



Black Grouse ... ... 81 



Blue Tit, 25 ; post-mortem 

 records, 26 ; field obser- 

 vations, 26 ; food of nest- 

 lings, 26 ; examination of 

 faeces, 27, 74; conclusion, 

 27 ; change in food habits 2 



Bobwhite eating weed seeds 71 

 Bramling ... ... ... 81 



Brown Owl, 63 ; post-mortem 

 records, 64; examination 

 of pellets, 64 ; conclusion 64 

 Bullfinch, 39 ; post-mortem 

 records, 41 ; field obser- 

 vations, 42 ; food of nest- 

 lings, 42 ; conclusion ... 42 



Californian Thrasher .^ 79 



Calonnis chalybea ... 78 



Capercaillie ... ... 81 



Capringulus europaeus ... 84 



Carduelis elegans ... ... 30 



Carpodacus mexicanus fron- 



talis ... ... ... 10 



Chaffinch, 36 ; post-mortem 

 records, 36 ; field obser- 

 vations, 37 ; food of nest- 

 lings, 37 ; conclusion ... 37 

 Chamaea fasciata .. ... 79 



Chipping Sparrow... ... 12 



Chrysomitris spinus ... 81 



Coccothraustes vulgaris ... 81 



Columba oenas ... ... 68 



Columba palumbus... ... 66 



Columbidae ... ... n 



Corvidae ... ... ... n 



Corvus frugilegus ... ... 55 



Corvus monedula ... ... 53 



