I suggest you follow :: https://www.quora.com/What-are-the-real-life-applications-of-Fibonacci-series

https://www.theodysseyonline.com/7-beautiful-examples-fibonacci-sequence-nature

Pappas, T. "Fibonacci Sequence," "Pascal's Triangle, the Fibonacci Sequence & Binomial Formula," "The Fibonacci Trick," and "The Fibonacci Sequence & Nature." The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, pp. 28-29, 40-41, 51, 106, and 222-225, 1989.

Have you take a look on some reproduction process of some mammal like goat, sheep etc?

A goat may give birth to a new kid then both move on giving to other set of kid again in that sequence.

This sequence may be 1,1,2,3,5,8,12,... as new population of goat.

I will try suggest more.

http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibnat.html

https://science.howstuffworks.com/math-concepts/fibonacci-nature.htm

Thanks everyone for sharing the resources. I will take a look at the papers. Thanks again.

Dear A.T.M. Golam Bari What do you mean by counting the number of flying birds? Is it about the bird's species? Or the numbers of their configurations and patterns do they form when fly?

Anyway, new observations about new patterns may show potential original work. Especially, if the related to well-known recurrence such as of the Fibonacci

Fn+1 = Fn + Fn-1 , that produces 0,1, 1, 2, 3,5, 8,13, 21,-

their ratio converges to the golden value. Patterns of any type are useful too.

Good luck

I think you can find more answers here: https://www.researchgate.net/post/Occurrence_of_Fibonacci_sequences

Hope it helps!