Scientists from the Zoological Society of London (ZSL) undertook the first ever comprehensive count of pups in the Thames, taking hundreds of photos during the pupping season in 2018.
After analysing the images, they have now tallied up a total of 138 common seal pups, which they say is clear evidence that the species is breeding in the river.
Click here to read the rest of the article.: Seal pups counted in the Thames – Discover Wildlife