Dear Naglaa,

I assume you are referring to flight initiation distance, also designated as flight distance or escape behaviour.

Quick searches on Google scholar (links below) yielded numerous results, especially on lizards and birds, but specifying your species of interest will probably be helpful.

For example, one review examined the differences between sexes in the response of various ungulates species.

Good luck!

scholar.google.ch/scholar?q=flight+distance+escape+age&btnG=&hl=fr&as_sdt=0%2C5

scholar.google.ch/scholar?q=flight+distance+escape+male+female&btnG=&hl=fr&as_sdt=0%2C5

http://web.csulb.edu/~tstankow/Stankowich2008BiolCons.pdf

Dear Charlotte Récapet

thank you very much, really I refer to the defensive behaviour of animals (cattle, horse) against fly attack

Alright, sorry for the misunderstanding!

In found the following publication on dairy cows of differing ages as a starting point (link in research gate + PDF as the authors did not upload the full-text). You could maybe get in touch with the authors?

Article Behavioural responses of dairy cattle to the stable fly, Sto...

Dear Charlotte Récapet

thank  you very much