Eyes colour changes (变色的眼睛)

Shots some pictures of this cute little spider, noticed that the 2 big eyes (middle front eyes)keep changing colour and this is because the spider eyes is focusing on different area.
拍摄了几张同一只小蜘蛛的照片，注意到它前面中间的俩只大眼睛一直不停的变换颜色原因是它的眼睛一直在对焦着。

Click the image for larger view - 点击图像放大