This adult was one of 3 Northern Shrike's on the trip. I had one each way in transit in northern Wisconsin as well. Light is terrible again, but you can make out the pale base to the impressively hooked bill. Though this is an adult, it was subtly barred underneath, which barely comes out in these photos.

Notice also the narrow mask, with the black not extending over the bill, white under the eye, and very long-tailed look of the Northern.