I took my berdie out in the sun for an hour today and he went from gray to a yellow color. I take him out in the sun all the time and this has never happened before. I live in south texas so it was 95 degrees out side. I checked the rock he was on it was 120 degrees. he didn't seem to mind cuz he stayed there with his head up high and his mouth was open. At about 1/2 into the bask he changed color from gray to a yellowish color is this normal?