Following the contours

  

This morning I was watching some Barn Swallows (Hirundo rustica) feeding on insects along a rocky intertidal surge channel when I noticed that a few of them were landing on the rocks along the sides of the channel.  There was a mix of adults and juveniles.  Here are two different juveniles.

 

 

It was interesting to watch the swallows using the contours of the intertidal zone to access concentrations of insects!