Can't help with Gilbert, AZ but Dead Horse State Park is a very popular birding area. Dead Horse SP is not far from Cottonwood, Jerome, Sedona, Camp Verde, and is in the heart of the Northern AZ wine country.
The 'Verde Valley Birding and Nature Festival' is in Dead Horse in April. The festival starts taking reservations Feb. 1.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.