From "AREA 51" VIEWER'S GUIDE by Glenn Campbell (v.4.01, 1995), p.33:
Quote: Serious Beef. The most dangerous hazard on [Nevada] Route 375 [the ET Highway] is not alien spacecraft or U.S. security forces, but terminal encounters of the bovine kind. Since the highway is open range, stock wander freely across the road. Cattle are most dangerous at night when you can't see them until just before impact. Drive slowly and stay alert. Even in the day you should not become complacent. As one Rachel [Nevada] resident explained to me, "They got black ones for the night and tan ones for the day." The little ones pose a special risk: If Baby is on one side of the road and Mama is on the other, Junior could make a mad dash toward Mom as a car approaches. The final insult of colliding with one of these beasts is that after your car is totaled and your front teeth knocked out, you are required by law to pay for the animal. (Please don't hit and run. It's a great loss to the rancher, and your insurance should pay.)
Cattle are no laughing matter. These animals are dumb. They stand in the middle of the road. Sometimes they sit in the road. They look death squarely in the eye and chew their cud. One can see how they would be the subject of choice for lazy [ET] alien biologists: Cattle are easy to spot, easy to catch, easy to work on, and they don't have to pay for the animal.
My favorite lines:
They look death squarely in the eye and chew their cud. And,
They got black ones for the night and tan ones for the day. Yah, don't mess with the cattles, and hope the cattles don't mess with
you.