Chestnut-sided Warbler (Dendroica pensylvanica) at Boyce Thompson Arboretum, Sunday January 4, 2009. Demo Garden by artificial brook.

From "This Chestnut-sided Warbler was found by Steve Ganley and Roy and Jill Jones on 9 November 2008 in the picnic area at the Boyce Thompson Arboretum near Superior. Chestnut-sided Warbler is a casual transient and winter visitor to Arizona."

Chestnut-sided Warbler

Nikon D200, AF-S 300/2.8 and TC20E (2x), ISO 500, 1/60th second at f/5.6, fill flash. Full frame.

Without flash.

Detail of insect being eaten.

Input from others so far on the identity of the insect is:

  • a Hemiptera (true bug), most likely of the family Pentatomidae
  • a Katydid (Microcentrum rhombifolium). The general color is good and the wings are semi transparent.
  • I can't be sure but looking at your picture it looks like a Lace Wing, a very beneficial insect.
  • Although the insect is semi-crushed, I am reasonably certain it is a treehopper, f. Membracidae. These bugs have a pretty hard pronotum that might make them tough to eat.  The are also called three-cornered hoppers because of the thorn like processes. Looking like a thorn also allows these bugs to hide in plain site. Here's a link to a pretty good picture of the bug in uncrushed form:
  • The insect is to squished and bleary for a comfortable id. The bird looks great! Possibly a stink bug. Pentatomidae.
  • a Hemipteran (something like a leaf hopper) in the suborder Auchenorryncha and the family Cicadellidae - based on the shape of what he thought was the head and the size/shape of the wing. He said it could also be a small green cricket but he couldn't see any antennae.

Another Chestnut-sided Warbler found at Rio Salado in downtown Phoenix 1/10/2011

And one from the Gilbert Water Ranch 11/4/2012