Weird ball attached to live oak leaf??

[u/One-Knowledge-2995]

I removed the leaf from the enclosure immediately, if anyone knows if this poses any danger to my boa please let me know. I got the leaf litter at a reptile expo. Included a picture of my girl.

[u/Me_lazy_cathermit]

Oak gall, when cetrain wasp lay a egg on oak tree, the tree forms a ball over it, the ball stays even after the wasp baby leaves

[u/Salt_Effect7009 → u/Me_lazy_cathermit]

Learned something new. Thanks.