More thoughts about Merlin, the new audio ID app from Cornell Lab of Ornithology; Native desert plants that attract birds and other desirable wildlife; Nature Conservancy/Arizona restoration of Aravaipa Creek northeast of Tucson a great success story; Bird-of-the-Week: Great Blue Heron; Birding Hotspot: Bill Williams River/Lake Havasu National Wildlife Refuge IBA; Friends of Wildlife Agency: Friends of the Huachuca Mountains; A calendar of birding events throughout Arizona in the days and weeks ahead.