Western Tanager, should be far down in Mexico

This female Western Tanager was one of the many interesting birds at and near the Warbler Rest Stop at the So. Padre Island Convention Center. This species winters from central Mexico down into Central America so this bird is a few hundred miles north of where it should be. This species comes through the Colorado city I live in during both spring and fall migration, and they nest just nearby. I was surprised how this bird was not shy, feeding and perching out in the open only 50 or so feet from birders. Very different from the Western Tanagers that skulk and hide during their migration in Colorado. SeEtta