The object shown here is not any known form of drone. Additionally, the photographer says that it was quite large, although there is no way to compute the actual size without knowing how far it was from the camera. It is one of a growing number of strangely shaped UFOs that have been appearing worldwide and in space. The Huffington Post article sourced here describes a number of other cases.
https://www.youtube.com/watch?v=g73VzaEhljAStory Source:
http://www.huffingtonpost.co.uk/2015/09/02/photographer-captures-strange-organic-looking-ufo-over-costa-rica_n_8075560.html Dreamland Video podcast
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