Chickasaw National Recreation Area. Sulfurous spring water ran through several small creeks.
Here we found a huge flock of Cedar Waxwings drinking water. Waxwings love water. These are are one of our most frugivorous birds. The problem in the winter is that the dried fruit they consume tends to cause dehydration. The birds counteract this osmotic stress by drinking water (or snow) (Wikipedia). In the summer, water is not as critical. Then fruits are juicier and the waxwings also supplement their diet with small insects and insect larvae (Witmer et al. 2014).
If you look closely at the flock drinking in the lower photo, you may notice, on the left, a waxwing with a bright red tail tip. This color, according to Cornell University, is the result of the bird’s eating introduced ornamental honeysuckle berries with red pigments.