Two notes about listening to the microphone in the Radisson nestbox.
1) if you can't hear the chicks or think you aren't hearing them as well as you should, turning up the volume doesn't appear to help as much as using headphones/earbuds. Check that your volume isn't too high and then plug into your speakers or your computer. Folks have been finding that the headphones/earbuds help to block out other noises so that your brain can concentrate on the sounds from the microphone.
2) with the wind today, street/urban noises are much louder and finally you can hear the wind doing a bit of a howl through the louvres. I found a video I made last year or the year before to catch the howl so I'll post that on the YouTube Gallery this weekend - the audio is what I was going for, so the video part is boring, its just of a wall.