The name may be because of the large amounts of pigeons that can be seen in the spring and autumn months on Palomar Mountain , or it may be because of an old pigeon-raising building built there by the Spaniards . The name may be in reference to the large shoals of pigeons that can be seen during the spring and autumn months atop Palomar Mountain or reminiscent of an old pigeon-raising facility built there by the Spaniards .