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Ictinogomphus ferox
A quite large heavy-looking dragonfly.
Seen on flying around some bushes in the Entebbe Botanical Gardens on the banks of Lake Victoria
You have a lot of dragonflies! Here is where I would go for ID, but it can be quite time-consuming working thru the site. You might be able to get other users to ID your pics or point you in the right direction:
http://www.africa-dragonfly.net/