| WATERFOWL BREEDING GROUND SURVEY IN OREGON, 1949 
William 5, Morgs 
lntroduction 
In past yoarsa the only waterfowl reproduction date asscured hy ths Orsgon 
Gans Department waa the rsacording of random asst and brood data by our district 
blologists. Realizing that this method was of little value in msasauring trends, 
we astabligshed 4 systen of permanent cansus samples in 1949. These sama samplss 
will ba wasd seach yosar and will previde trend information. 
Ths samples are seattersd in seach of the 149 games districts of ths Stata. 
All sampling is dons by resident gams biologists, The duties of thess mon 
make it 5 physical impossibility to conduct ths censua on sxact dates, so data 
are given generally by period. 
Hethods 
The strip count or trenasct method is used. Sampl+ arsas are located in 
gach of thas 13 game districts in the Stats. It is smphasiazed that thsss samples 
are lecated on choices waterfowl habitat and do not indicats ths over-all Stata-~ 
wida production. Thsy ars sst up to provids trand information only. "Birds 
of Orsgon" by Gabrislson and Jawstt waa used as standard for listing brasding 
populations. ALL spetise not listed as breeding in a givon locality ware not 
considerad in the population census, 
Data Collsctsd 
A. Bresding Population Cansus [Praliminary Pariod) 
lL. Population statistics (Sse Tabla I). 
2, Chronology of ths nesating ssason. No information availabis, 
This year was normal in comparison with other ysars, 
3, Waather and Water Conditions, VWesathsr was exesllant, batter 
than in most years. In a fow arsas, heavy snow runoff floodsd 
early nesting birds, particularly g¢ea2. This loss waa light. 
BE. Brood Census (Second Feriad} 
1. Hatching success date, No information available, Iutiess 
of psrsonnbl do net permit time for a study of individual 
nests. 
2. Hrood asurviral data. Sess Tables 3, 4, and 5, 
9a. Weather was axcallent. Water levels were adsquats until 
broods ware Lares anough to hors. 
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