Table 2. Food and drinking water inputs of hydrogen in hair and feathers of different organisms.

Species	Food (%)	Drinking water (%)	Reference
Woodrats	75	25	[17]
Japanese quail	74–69	26–32	[24]
House sparrow	82	18	[21]
Humans	69, 64a, 73b	31, 36a, 27b	[27]

^aData after [15]

^bData after [8]