Eft Meaning in Bengali

What is the meaning of word Eft in Bengali/Bangla ?

Defenition of word Eft

Example

Most migrations of efts reported in the northeastern Unites States occur in both spring and fall (April and May and August to October).

Other Meaning of Eft

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  পরে later on eft away off post
  পরবর্তি কালে eft