We have been getting lots of concern about how slow feeders are right now, for birds and small mammals. This happens every few years when natural food sources are in high abundance. The animals are here, just not as visible in the yard.
See Derek's blog from November 2017 - the last time we saw this phenomenon in full force. Though some of what is in there does not necessarily apply because every year is different, the general message is the same. There is no need to worry. Our backyard friends are relishing a bounty of food in the woods and fields right now.