Ant carrying off a caterpillar

Ant carrying off a caterpillar

Observation - Ant carrying off a caterpillar - UK and Ireland. Description: An ant carrying a caterpillar which was not struggling, so was it dead or willingly being taken to the ants nest Trojan Horse style ? Can anyone identify the caterpillar ? The ant was really struggling to get the caterpillar through the tangle of grasses

An ant carrying a caterpillar which was not struggling, so was it dead or willingly being taken to the ants nest Trojan Horse style ? Can anyone identify the caterpillar ?
The ant was really struggling to get the caterpillar through the tangle of grasses.