Spurge Hawk Moth

Good evening!!
I have just discovered 3 Spurge Hawk Moths on a plant that I gathered last year whilst on walks with my dog.
Could anyone tell me if they are useful in the garden (veggie or flower) - they are so beautiful, so if they aren't I will release them back along the path where I gathered the plant (which is prolific). I believe the plant is called Spurge.
Any suggestions gratefully accepted.
Tui
PS I will try and post a photo but that could take time as my iPad is refusing now to transmit the photos to my MacBook. I will photo tomorrow with my phone and try to upload.
I have just discovered 3 Spurge Hawk Moths on a plant that I gathered last year whilst on walks with my dog.
Could anyone tell me if they are useful in the garden (veggie or flower) - they are so beautiful, so if they aren't I will release them back along the path where I gathered the plant (which is prolific). I believe the plant is called Spurge.
Any suggestions gratefully accepted.
Tui
PS I will try and post a photo but that could take time as my iPad is refusing now to transmit the photos to my MacBook. I will photo tomorrow with my phone and try to upload.
A good hoeing is worth two waterings.
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