As I watched two coyotes this morning, I sensed a pattern. So, I looked through all my (dated) coyote pictures for a decade and the pattern became clear: I only see coyotes hunting from December through April. Now, I live at the valley bottom. I am sure that the general coyote absence during the summer is merely a consequence of their having moved higher in the mountains as the snow recedes.
Two coyotes emerged from the brush alongside a tertiary road. 
They ignored me standing nearby, but soon drifted across the road and into the woods on the other side. 
Thank you for these lovely pictures of coyotes, Alistair. They are beautiful animals, and I enjoyed your observation regarding the timing when you typically see and photograph them during the year.
They are a wonderful part of the creature activity. Good photos and unexpected. I live on the forest so I muscle test – Cougars? Coyotes? – before letting her outside.