I have over the past month seen a variety of birds, pidgeons, swans, ravens, magpies and i have found they have meant very similar messages, distinct but similar at the same time.
I use the site
www.whats-your-sign.com, it breaks down by type of bird, but also by what birds mean in general, one of my favorite quotes having a bird as a totem is often like 'a wink from god'