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Idaho’s Cassia Crossbill

Join Stefan on a whirlwind trip to Twin Falls to see the American Birding Association’s newest bird! The Cassia Crossbill was split from Red Crossbill in the fall of 2018, and because of the low number of Red Squirrel in the South Hills of Idaho, this is the best place to see this newly described species. Moreover, they are resident in the area, as the pine crop is good every year. The absence of red squirrels also means that open-cup and ground-nesting songbirds are abundant and active deep into July when most other mountain areas have already quieted down substantially, so the birding should be good even when we aren’t watching our target species.

Register today to Cross(bill) it off your list!

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We will take our time en route, stopping to bird around the La Grande area. Red Bridge State Park, Bird Track Springs, and Spring Creek are all good spots to pull in for a little while to look for Black-backed and White-headed Woodpeckers, Western Bluebird, and Gray Catbird, and you never know what will await you in the Blue Mountains. From there we will work our way to Twin Falls, swinging in at Indian or Blacks Creek Reservoir which can be very active wetland birding for many different species.

Our main day will take us up the South Hills to Porcupine Springs CG and/or Bostetter CG to search for Cassia Crossbill. Other target birds include Green-tailed Towhee, Vesper and Brewer’s Sparrows, Cassin’s Finch, Hammond’s, Dusky and Cordilleran Flycatchers, and Yellow-breasted Chat.

Our final day will be the return drive to Portland.

Trip Details

Tentative Itinerary
  • Trip Leader: Stefan Schlick
  • Fee: $845 member / $945 non-member
  • Deposit: $400
  • Single Supplement: $130
  • What is included: All ground transportation from Portland. Lodging is based on double occupancy, all your meals except dinners, the services of your experienced Portland Audubon leaders.
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Group Birding & Trip Etiquette



July 9
July 12
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Erin Law