It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
pigs mud piglet deer park young head drawing digging around dig nature animal sniffing pig nose snout bristles nose foraging mattsch habitat rooting wild boar wild proboscis
Page 2017 Free-images.com. All images are Public Domain