A commotion outside my kitchen window caught my eye one afternoon earlier this week. At first I could only make out a female bh-cowbird fluttering to my deck and assuming a defensive crouch. Then in hot pursuit out of the bushes and through the railing came a pair of cardinals. The female cardinal led the attack and was especially relentless, showing no mercy as she repeatedly pounced and pecked beak-full's of feathers from the cowbird. The male cardinal basically played a support role, only following his mate's lead and never coming into contact with the cowbird. I've never seen a female cardinal so angry. But was she ever mad. I suspect she caught the cowbird trying to lay an egg in her nest or at least coming too close for comfort. I've heard that year-round species are more successful in defending their nest against cowbirds. This pair at least is giving it a good try. A pair of cardinals nests somewhere in my back yard each year and usually close to the house but I haven't yet located their nest site this year. The location of the above conflict didn't offer any clues as to its whereabouts. Jim Seelhorst St. Matthews (Louisville)