The Bangladeshi Doel is a species of particular interest because its symbolic interest.
Is it correct sentence?
No, it should be “because of its symbolic interest”. The repetition of “interest” also makes the sentence slightly weak or awkward.
Then, what is your suggestion to remove awkwardness.
Do you have any ideas?
The Bangladeshi Doel is a species of particular interest because its symbolic significance.
Can it be?
Yes, very good suggestion.
(However, when you copied the sentence you forgot to insert the word “of”.)
yes!