Lake George had various species of turtle (10)

I believe the answer is:

loggerhead

I'm a little stuck... Click here to teach me more about this clue!

'species of turtle' is the definition.
'loggerhead' can be an answer for 'turtle' (loggerhead turtle is a kind of turtle). I am unsure of the 'species of' bit.

'lake george had various' is the wordplay.
'lake' becomes 'L' (geographical abbreviation).
'various' is an anagram indicator.
'george'+'had'='georgehad'
'georgehad' anagrammed gives 'oggerhead'.
'l'+'oggerhead'='LOGGERHEAD'

Can you help me to learn more?

(Another definition for loggerhead that I've seen is " turtle with worldwide presence".)

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