Forgive a photographer for noticing, but the contrasting photos showing the vegetation change, are 1. not the same scale, 2. not the same horizon 3. not from the same perspective, the second shot is taken from further to the right.  4.  For those interested, slide the cursor all the way to the left, than watch the lower left corner.  First notice the distinct line at the bottom of the bluff, then the slide area just to the right of the patch of bushes.  The slide area to the right of the bushes is drastically higher on the second photo, making it appear that the bushes have moved much higher up the ridge.  "Science" photos used to compare and contrast are much more useful when they are done accurately.