Most operating systems include a basic photo editing tool. Either crop it, or save it as a more condensed file format. GIF is usually big, jpeg not so much.
Sometimes, that will happen if you do an image search and just try to copy & paste the image without going to the actual site where the image is found. If that doesn't make any sense, feel free to message me and I will try to explain better.
I've cropped it and it was a Jpeg by default. Also It was a picture I took with my cell camera . I guess I'm screwed on this one. Too bad it was a funny picture.