1912] Bryant: Relation of Birds to a Grasshopper Outbreak 5 



time occupied was four hours, one to five in the afternoon. The 

 two regions are similar in the general character of the land and 

 crops, but an error may have been introduced in the censuses, due 

 to the fact that I walked through one region and drove through 

 the other. The larger amount of swamp land in the vicinity of 

 Los Banos also accentuates the contrast in the two censuses. 



BIRD CENSUSES 



Great Blue Heron Ardea herodias herodias 2 



Anthony Green Heron Butorides virescens anthonyi 3 



Black-crowned Night Heron Nycticorax nycticorax 7iaevius 4 



Black-necked Stilt Eimanlopiix iiK.iicaints 2 



Killdeer Oxyiflmx mnfinis 4 



Western Mourning Dove ZenaiJura macroura marginella 3 



Burrowing Owl Speotyto cmiicularia hypogaea 1 



Red-shafted Flicker Colaptes cafer collaris 



Western Kingbird Tyrannus verticalis 9 



Black Phoebe Sayornis nigricans 2 



California Horned Lark Otocorix nlpmU-ifs actio 2 



Bicolored Red-wing Agchimx iiliurii i, ins calif ornicus 252 



Western Meadowlark Stiiriiflln iu-,jl,-rta 36 



Bullock Oriole Icterus bullocM 8 



Brewer Blackbird Euphagus cyanocephalus 1 



English Sparrow Passer domesticus 6 



Linnet Carpodacus mexicanus frontalis 37 



Green-backed Goldfinch Astragalinus psaltria liesperophilus 



Heermann Song Sparrow Melospiza melodia heermanni 4 



Western Lark Sparl-ow Chondestes grammacus strigatus 1 



Western Blue Grosbeak Guiraca caerulea lazula 



Lazuli Bunting Fasserina amoena 



Cliff Swallow PetrocliiVdoii hiiiifronslunifrons 85 



Barn Swallow Hirurnlo i riilliruf/iistra 74 



California Shrike Lariivs Uuhn-icUiniis ganibeli 6 



Long-tailed Chat Icteria virens longicauda 3 



Totals 345 



Average number seen per mile 114 



Average number seen per acre 9 



The figures indicate that the red-winged blackbird was the 

 bird most abundant. Next in order of abundance were cliff 

 swallows, barn swallows, western meadowlarks, linnets, western 

 kingbirds, and shrikes. The difference in the numbers seen per 



