When keepers discuss the subtle phenotypic differences of the Mexican variant, what characteristic might sometimes trend towards a deeper hue?

Answer

The leg hair hue

Anecdotal reports suggest that certain Mexican populations might show a tendency towards a deeper, coppery, or reddish-brown tone in their leg hairs compared to some paler Arizona specimens.

When keepers discuss the subtle phenotypic differences of the Mexican variant, what characteristic might sometimes trend towards a deeper hue?
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