Very good day today for bike-birding!  I got good looks at 15 spp. of warblers; had to let a few others (heard only) go as "maybes."  Found a young Great Horned Owl to still be in the nest, whereas most others have already fledged.  Still some Ruby-crowned Kinglets around.  First Blue-headed Vireos I've encountered this season.  Watched a Clay-colored Sparrow singing from two feet up in a nearby bush, which was fun.  First hummingbird as well.  And the Cardinal nestlings I'd been watching are suddenly not there -- I hope they fledged successfully and aren't now in the belly of a free-ranging cat. 
   Yes, I'm leading trips, including one on Sunday morning.