You may find that you get them more often than you see them. We get yaffles in our garden, also the spotted kind but they are very good at hiding, you only see them if you get too close and they fly off yelling or maybe you hear them pecking.
We lived in New Jersey US for a while (back in the UK now) We lived in a house that was totally wood except for the chimney, so which bit did the stupid woody peck at? Yup!
In the house it sounded like having your head in a bucket and someone hitting it.