I usually have 15 pairs of cardinals in winter and I noticed today I haven’t seen a cardinal since autumn. I’ve been feeding birds for >20 years. On a day like today, with 18” of snow on the ground, I should have plenty of cardinals. Maybe it’s a local problem, like a hawk or cat that’s been attracted to a cardinal roosting place or something. But I’m wondering if anyone else is missing or has seen a drop in cardinal population in northeast US.