You can choose to update your personal settings and link your Instagram account to Birda so that people can follow your adventures on there as well as Birda.
Navigate to your Profile page in the bottom right of the footer menu.
Click on the "Edit Profile" button.
Add your Instagram handle to the "Instagram" box.
Press "Save" in the top right corner.
Your Instagram account will now be linked to your Birda profile.
You can also add a Bio here too.