Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-24994749-20140910131215

Legothire wrote: Banana boat. Doodoodoodoodoo! I wonder how Qrow found out about Yang and Ruby walking to see their past mothers location though.. It has been suggested it has to do with his semblance.

Alternatively, he might have been watching over them closer than normal due to Yang's dad emotional state and Yang's search of her mother (depending on how much Qrow knows about her, he might have been worried that Yang could end up somewhere not so nice).

It's also possible he was just doing a patrol around the place because it was Grimm nest, near a human population area.