If deactivating plugins has not worked, the problem may be the theme you are using. Just activate default twentyfourteen or twentyfifteen theme & try again. I think this should fix the issue.
If the white screen is appearing after login, you should deactivate all the plugins & login again to see if the problem persist.
http://www.getbirding.com/wp-login.php is working fine for me.
You may need to clear your browser cache.
Visit the link & then Press CTRL + F5
