There is not much you can do. Cherries can go dormant early if they are having trouble, and then start over next spring. So, if the tree has buds on it and the wood is green, just wait for next spring for it to recover. They can do this because they come from a short season climate, they expect summer to be very short. Scott

I had nearly the exact thing happen this year (2025). This box had crisis last year when I found the nestlings wet, their nest soaked and berry seeds abundant. What I was told was that the parents were feeding them non-native berries because there weren't enough insects! I took the nestlings out, cleaned the box, replaced with a dry nest and supplemented with mealworms. Two males and a female ran nearly 100 mealworms into that nestbox within the next 20 minutes! It was a rescue mission. The nestlings all survived and fledged three days later. But this year, that nestbox wasn't touched until way late in the season. I was glad to see they were back, better late than never. But maybe not. Four eggs, four nestlings, all looked well. I checked them a day ago, providing rehydrated mealworms. I noticed some dog doo near where I put the mealworms. I wonder if that could affect the nestlings by contamination. I took the bos down and it felt light. I wondered if they had fledged but it was too soon. All four melding together and decomposing! This park is chemical-free, the only one in Orange (CA). All the other nestlings in the other five boxes had a good run. This was a special box and had yet another disaster this year! No evidence of foul play, no insects, etc. Another seasoned monitor told me it might be due to the male not returning, maybe killed in a fight, and the female abandons the nest. The nest box is down, washed out and waiting for a thorough cleaning. I hope they return to this box next season. We'll see. Very sad.

For some reason my male found my front windows today. He's been here since March and has eggs that should be hatching around Wednesday. He is not pecking them just fluttering around in front of them. He did this nearly all day. I think I saw another male hunting across the field. I hope this will not keep him from his fatherhood duties. He sure must have worn himself out. Putting in for more worms tomorrow. Wish I could help you but I seem to be in the same boat.

Hi Mary- the only other possibility that I can think of is if something happened to one of the original mates & the remaining one found a new mate, the new mate will rarely have anything to do with the eggs/babies since they weren't their offspring. In this case, the new mate often steers the original mate away from the eggs/babies so they can try to produce their own (may not even try to produce since it's late in the nesting season). I would think it would be one of those scenarios. Research shows that it's about 10 degrees hotter in the box than it is outside. If it's in 90's, it could be too hot for them. Hatchlings can't regulate their own body temps for first 6 days. Risk would be same if too cold at beginning of season. If lawn pesticides (could be neighbor's if yard is close), babies are usually bloated. Did you notice anything unusual with them? Bloating or markings? Those are my only thoughts. Such a bummer & so sorry!