I think those are some type of chorus frog....a bunch of them.

I never see frogs at this time of year, and I think it coming from up, I might try to listen tonight again to be sure.

Where are you, starlinka?

Claire

Eastern North Carolina - it in my first message :) it is very heavy rain here right now, so I would have have go to woods to see where sound coming from another day if they still will be active - it will be getting lot colder after today with bellow 0C at night.

I'll listen frogs sounds online later and will let you know. They might be frogs because i dont know who else could, I never thought they might be active in such weather, we do have some very warm days, but it changes to below freezing few days later, it is 46F right now and I can hear them. It still raining here so sound is unclear, I have storage place back there in wooden area and keeping long range baby monitor for security purposes - this why I can hear them, but cant really tell where its coming from right now, in summer it did sound like it was coming from sky and I could hear them in my yard too. I do have some tall trees here.
This is 1 month local weather tab

Looks like I finally found who that mystery frog is, I checked link on leaps.ms - it sounds close, but not exactly, so I googled for NC tree frogs and started to listen all on this page http://bio.davidson.edu/herpcons/herps_of_NC/anurans/anurans.html
Spring Peeper sounds exactly the same, also it says:
"Rarely seen during the summer months, spring peepers loudly announce their presence during warm, rainy nights and overcast days, most frequently from November to April. However, if conditions are right, they may call at any time of the year."
It is down to 41F now, but they still singing, I have hard time believing they can be so active and happy with such low body temperature :)

YAY! I'm glad your mystery is solved. You know.....I thought of spring peepers, but it seemed impossibly early/cold for them. How curious this is. I think a lot of things in nature are confused by climate change and its inconsistencies. Do you live really close to a body of water or swamp?

We have artificial pound on middle of pasture near my house, but its open area so I dont hear those frogs in there right now, but woods next to it are semi wet, has small pound/puddle with water more or less all year around, also right now after all that rain most of that area is more like swamp.

I would understand confusion if they would be warm blooded, but I thought amphibians would be lethargic at such low temperatures, instead they are happy and singing all night long :)

Its 30F right now, already bellow freezing - they not even slowed down yet :)

I might catch one and keep it as pet in fridge :) :) :)

I think I've figured it out starlinka.........I think someone is broadcasting a recording of them! :) It's all very curious. They must find enough warm places to hide to warm up.

They slowed down when it reached 28F last night, almost went silent with occasional peeps, but they back to active singing tonight - its 40F now.

You should find some sort of nature organization-type place around there and tell them about this. I hope it's not a harbinger of bad things to come. I don't know about spring peepers, but other frogs can die if they come out of hibernation when it's unusually warm, and then it turns cold. They aren't able to slow down their metabolism in time and freeze to death.

It says in wikipedia they can survive freezing of their body fluids up to -8C (17.6F)

It will be down to -5C max for few nights this week, so they should be safe because it is still in their tolerance range.

We had icy rain here for last two nights and I didnt hear them (with ice banging it was to hard to hear anything at all anyway). Maybe they knew weather is getting cold and went dormant for while. I'll see tonight is they will sing or not, rain here finally stopped.

I've read where some northern wood frogs can freeze to below 0 F, and still thaw out in spring and be fine!

Last week was really cold one, one night it reached 15F, and around 32F in daytime all week, but it is warm again and they singing very loud for the last two nights - looks like cold week didn't harm them at all.