Red Crossbill (Loxia curvirostra) is considered an "Irruptive" species in the trans-Pecos of Texas. Irruptive: with a meaning in this context as "might be seen, at times abundant, in some years but absent in all others." Even in irruptive years, its abundance is not Common but Occasional.
Already this fall Red Crossbills have been reported in El Paso, Frijole Ranch in Guadalupe Mtns Nat'l Park, and Van Horn.
As the sun was quickly heading toward the Del Norte mountains (from my vantage point), I spotted at least a flock of 5 in Marathon.