Kroy Biermann Excludes Kim Zolciak in Christmas Post with Kids

Kroy Biermann is highlighting his holiday by snubbing his estranged wife, Kim Zolciak ... and her exclusion is jarring.

The retired NFL'er threw up a snap of him and his 4 kids with KZ -- Kroy Jr., Kash, Kaia and Kane -- with Papa Bear standing proudly behind them and grinning from ear to ear. His caption was also pretty telling on how he's feeling about his marriage/divorce right now.

He wrote, "Merry Christmas from the Biermann’s!!🎄 (-2 😢) I didn’t get a picture of the family enjoying @arianabiermann ‘s church service and I had this taken after @briellebiermann and Billy had departed in the direction of their car as we were almost outside from our service."

KB added, "I couldn’t be a more proud father of you 2 and the littles! ❤️ Got to do better at remembering to capture more pictures." Interesting ... he noted Brielle and Ariana here -- who are actually Kim's biological daughters -- but not their mother.

BTW, no posts from Kim herself ... she hasn't thrown anything up since mid-December.

This marks just the latest up-and-down moment for them ... for now, it seems like Kim and Kroy are on the outs -- this after sending signals of reconciliation just a month ago. Of course, they also had a huge blowout fight that required the cops to called over.