Does this technology help prevent collisions with animals?

Probably only those proceeding fairly slowly on two legs. I can't see it being much help if a muntjac leaps out in front of a fast moving car.

Does this technology help prevent collisions with animals?

It certainly should do with a deer as this is quite a big animal.

But, unless the deer you hit last year jumped on to the road right in front of you (in which case, it being misty was irrelevant), you were driving too fast for the conditions. In misty or foggy conditions, your speed should be dictated by how far you can see. I say this because I personally wouldn't rely on a system like this to allow me to drive faster in misty or foggy conditions that I would consider safe otherwise.

I had a look at Citroen's website, 'Pedestrian/Cyclist avoidance technology' is not mentioned re the C5 X. Listing the technology features, 5 separate sections are given over to 'Highway Driver Assist' (this is given most prominence), 'Rear Cross Traffic Alert', 'Long-Range Blind Spot Monitoring', 'Top 360 Vision', and 'Proximity Keyless Entry And Start'. In a few lines of text under this, 'Collision Risk Alert' is mentioned as one of the features in addition to the above, but the wording suggests that it won't actually do anything other than warn you, i.e, you are still going to have to stop/brake/steer around whatever it might be.

Does this technology help prevent collisions with animals?

So in direct answer to your question - yes, it can help, but it doesn't prevent.

If someone is nearby, then I think it is possible such technogy saves lives. However, none of this technlogy is not going to stop wallies on electric scooters, jumping from the pavement onto traffic and causing people to avert.

Whilst, it may catch a nearby cyclist, but some cyclists are speed demons.When cars are waiting at a junction waiting for ligths to turn green. I haev seen some cyclist whizz at 25mph, but the driver who turns left at a green, can't see that ten cars back that a cyclist is whizzing so fast. most will not stop and assume it is a driver fault for not checking mirrors. No technlogy is going to be able to pick at up, until it is too late.

Agree if you hit the deer in misty conditions you were not driving at a safe speed where you could stop safely in the distance you can see.

However your question was based primarily around if technology would have helped and I think the answer is yes.

Collision avoidance relies on 2 basic technologies, LIDAR (Laser Detection and Ranging) and RADAR (Radio Detection and Ranging) both of which can penetrate fog and mist.