AZ Governor seeks applicants for opening on Arizona Game and Fish Commission. Birders welcome. Statutory eligibility requirements apply. New app Bird Migration Explorer tracks bird migration in remarkable detail. Bio of John Stevens Henslow, mentor to Charles Darwin and for whom Henslow's Sparrow is named.  Bird of the episode: Ladder-backed Woodpecker. Birding hotspot: Lower San Pedro River IBA. Friend-of-Wildlife organization: Sabino Canyon Volunteer Naturalists. Calendar of Bird Friendly events coming up in Arizona.