As the crow flies (sorry for the bad pun), the storm water management ponds in the Kings Farm development are right next door to well known Mont Co warbler hotspot, Watt's Branch Park. A few years back, when I had more time during the week, I always found it productive to stop here on my way home after birding Watt's Branch with Paul O'Brien. Paul mentioned to me a few times that his son, Michael, had some great birding in the area years back before all the houses were built.
After exploring the areas around the ponds, I also found it productive to drive slowly along Crooked Crk Dr and Thompson Dairy Way w/ window open listening for interesting warbler song.
Karl - thanks for your post. I will migrate my sightings from personal location to the hotspot listed in eBird.
Andy Martin
Gaithersburg