Crabs are also largely taken by crocodiles under , especially the genus "Potamonautes", with different species being the primary crustacean food in different areas. Mollusks may occasionally be taken by young crocodiles (they are taken in larger numbers later in life in parts of Uganda and Zambia). In the Okavango Delta, Botswana, the diet was similar but young crocodiles ate a broader range of insects and invertebrates, with beetles taken in similar numbers to other, similar prey, both aquatic and terrestrial. In Botswana, arachnids were more often found in young crocodiles than in Uganda and Zambia. In Zimbabwe, the dietary composition was broadly similar to that in other areas. However, in the Ugandan portion of Lake Victoria, true bugs and dragonflies both seem to outnumber beetles notably and up to a length of crocodiles had stomach contents that were made up 70–75% of insects.