Guild Wars 2

The description says: “chance to summon a bird on your attack when hit”

Does this mean I have to be hit in the exact moment when I’m attacking? Does “on your attack” mean the moment I hit or the whole skill time (e.g. when using a symbole is this the whole lifetime of the symbol? )?

It means that your attack must hit the foe. So if you see numbers on your screen for the amount of damage, the attack has hit the target and there is a change to summon the bird. So it doesn’t mean you have to be taking damage.

This is done so you don’t get a bird when your hitting air or a foe that is out of range.