Gray squirrel foraging in leaf litter. Original public domain image from Flickr https://www.rawpixel.com/image/4025526/photo-image-woods-forest-natureFree Image from public domain licenseRed breasted nuthatch, bird photography. Free public domain CC0 image. https://www.rawpixel.com/image/6022206/photo-image-aesthetic-public-domain-treeFree Image from public domain license