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Darwin, C. R. in correspondent 
Caton, J. D. in correspondent 
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From:
Charles Robert Darwin
To:
John Dean Caton
Date:
20 Mar 1869
Source of text:
DAR 143: 254
Summary:

Asks about coat colour of elk,

the mane of American bison,

and about sexual preferences of female deer.

Contributor:
Darwin Correspondence Project
From:
John Dean Caton
To:
Charles Robert Darwin
Date:
5 May 1869
Source of text:
DAR 83: 170–1
Summary:

Females have no preference for particular males in deer and elk. Observations on sexual behaviour and characteristics of elk, deer, bison, and other animals.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Dean Caton
Date:
24 May 1869
Source of text:
DAR 143: 255
Summary:

Discusses secondary hoofs in antelope and deer.

Mentions tuft of hair on turkey hen.

Contributor:
Darwin Correspondence Project