Cross species "argument"? (1 Viewer)

Hi,

Yesterday I recorded an Eurasian wren and an Eurasian blackcap and I was surprised by the blackcap behavior. It looked like it reacted to the wren's song. The wren was perching nearby and it was clearly heard (not very well in my recording because I was using a shotgun microphone aimed at the blackcap).

Is this frequent or maybe is it my imagination?

https://www.xeno-canto.org/425726

In what way did it react? It is not uncommon for birds, or in fact any number of animals to react to the calls of others not their own...