Here is the follow up, as promised. This happened two seconds later , says my exif . the aerial combat took about 1.5 seconds
Yes, it is not as sharp as the other one. To be honest, this is hand-focus by instinct, hit or miss.
Many thanks for your overwhelming reaction to the previous siskin before he attacked.
Special thanks to Jason, Neil, Carol G and Carol B, Joline and Richard for the very precious user awards!