I like the harmony of the family portrait. I think the angle is not quite ideal and it could use some contrast and sharpening. Wish you could have gotten a bit more depth of field to get the ducklings sharper and also some better head angles. Though head angles are tough with one bird let alone six. Congrats! :)
I agree with Akos. Overall, a nice image, but I'd sharpen the head. I also would suggest f/8 or f/11, to try to sharpen the ducklings, and perhaps increase the ISO if the shutter speed is too slow at these apertures.