Shutter speed 1/30, ISO 1600 during the sunset time, so kind of low light in my backyard...... . first 2 pictures are noisy because i did more then 30% crop.Ah ok, that probably explains it. Did you also shoot them in RAW and then in post process not apply any noise reduction?
Was there a little air blowing? Don't forget that it takes only 1-2 mm to get the animal out of focus in such close distances.