Unsure moment for Azure Kingfisher

Wondered why Azure Kingfisher (Ceyx azureus) suddenly turned aggressive/defensive on fishing perch in Tyto yesterday.

Only after downloading images did I spot Little Kingfisher entering the frame. Two of them around today, but Azure didn't show up.

Here's the only closer look from soon after yesterday's wee bit of tension and just before the bird took off for parts elsewhere.