In running camera traps on Chuihuahuan desert water cachements, I have noticed that Bobwhite quail do not show themselves watering on camera until late autumn, when the Shinnery oak have dropped their deciduous leaves and the annual herbs have died off after the first major frost.

Does anyone have any ideas whether this relates to their life cycle, ingestion of vegetative water, or the disappearance of ephemeral water?

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