Make that 13 warblers species, with the addition of a singing Blackburnian in the woods behing the Nature Center.
   
  I checked the Dog Run, no additional warbler sp but I did have a Savannah Sparrow flush from the field.
   
  Regards
   
  Clive Harris
  Cabin John, MD

Gary Allport <> wrote:
  Dear All

After the first warm night for some time and a bit of cloud I thought that it 
might be a good morning for a crop of new birds in Rock Creek, but alas it was 
not the case. Despite the small number of birds the stalwart few plugged 
away for a couple of hours after dawn around the Nature Centre, Stables and 
Maintenance Yard and on reflection did accrue a nice list of common migrants -
a 12 warbler day can't be described as completely uneventful.