To get your hands on this piece of equipment, you will need to visit The Business at Fortuna on Venus. He will sell you a Tranq Rifle that you can use for capturing animals for 500 Solaris Standing.

How do you tranq animals in Warframe?

All you need to do is track the animal by finding its droppings. To do this, you need to have your Tranq Rifle equipped; then the various dropping locations will populate on the map, but only for animals types that you own a Lure for. They will appear on the map as a small blue icon.

Are there human tranquilizer darts?

Tranquillizer darts are not generally included in military or police less-than-lethal arsenals because no drug is yet known that would be quickly and reliably effective on humans without the risks of side effects or an overdose.