. I 15 29 12 DEC JAN Fig. numbci of bald eagles counted per invenloiv in ihe Upper Illinois River Region. 197( Seasonal patterns of hald eagle octiirrence in the Central Illinois Rivei Region are ilhistiated in Figure 20. No census tliglits were toiuhuied from mid-

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Keywords: ., bookcentury1900, bookcollectionbiodiversity, bookcontributoruniv