The Orangatang Mother and Child is mainly available in resolutions below 400x400 and this version was discovered 1220x1488. However, upon closer examination, it appears that someone has simply enlarged the original, low-resolution version.
We were not able to determine the origin of the cheetah image and could only find one image with a pixel height greater than 1000px.
We were not able to find any images near the 6000-pixel mark for any of the requested images. We have provided the largest images available in the public domain. Each image was searched by multiple engines in a reverse and similar image lookup. We also utilized the known names to search websites like Flickr and others for the images. There are nice alternatives to some of the images (such as this cheetah stock image for sale), however, in most cases, these images also do not meet the 6000+ pixel requirement.
Only the project owner can select the next research path.