History of the fox squirrel in Michigan 339 The area .340 Methods .341 Populations .342 Habitat description .342 Seasonal numbers .345 Comparative population density....347 Nesting .349 Hollow trees .350 Leaf nests .350 Breeding .354 Sex ratio .354 Physical characters .356 Breeding season .362 Fecundity .367 Development of the young .368 Disease and parasites .369 Pr?dation .372 Highway mortality .373 Weight and condition .373 Weight correlated with habitat ....374 Activity .375 Summary and conclusions .376 References .378
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Durward L. Allen (1942) studied this question.
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