Gene,
I just carved a perched barn swallow and initially had trouble finding good photos. Hugh emailed me some good ones and then I found some more at the James Peless photos at pbase.com/jpeless/image 61906530 and
www.digital-nature-photography.com/nature/showeng.php and searching for barn swallows.
I've not seen any patterns or photos of them swooping down--just sitting--but then I've not looked. Try these two sites--hope you can find some pictures of the pose you're looking for.
Donna T