I've had lots of birds on my feeder up close to the house this summer, but in the last 10-14 days they have just gone away it seems. Also, the squirrels. I've been suffering in Colorado (low 70s in the day time and 50s at night) for almost a week, and when we got back I saw the feeder had hardly gone down at all. Actually, I had noticed it before I left, but was busy and didn't pay much attention.
Maybe They all came up to my house since the sunflowers are loaded with seeds as well as a great number of birds,,,but it is more than likely the absense of water,,Last year I would have dozens of birds at the birdbaths every evening but not so much this year ..The most noticable AWOL is the catbirds they were here in the spring but I am not seeing any now
In the morning before it gets blazing hot turn the sprinkler on so it hits tree branches - then you'll know if birds are around. They'll start chattering and show up for a shower! I put out lots of seed, have livestock water troughs, and birdbaths spread around to help birds, bees, other wildlife and yes, wasp, survive this heat. [Please note I keep the water changed out daily to prevent mosquito larvae and algae.]
Last evening I was sitting on the covered deck birdwatching. I heard a "waap" sound on the metal roof above my head - what could that be? Seconds later a long skinny rope-like creature fell with another "waap" onto the deck beside me - it was a rat snake! My old cat jumped out of his skin, now you can't drag him out of the house!