Old Oak Tree at Beltzville Dam & Reservoir
The vibrant red color of fall foliage on oak trees is caused by the presence of anthocyanin pigments that are revealed as the trees slow down photosynthesis in preparation for the winter season. This reduces the amount of chlorophyll pigments that give leaves their green color and lets other hidden colors shine through.

Download Image: Full Size (1.4 MB)
Photo by: Stacey Hines |  VIRIN: 201230-A-A1403-903.JPG