Warbler Guy, a web site for Rare Bird Alert exists for early returning migrants? Early spring arrivals are noted at a web site? Bird migration arrival sightings would be great to know about...thank you.

Sharlene (in New York), feel free to see:

http://birdingonthe.net/hotmail.html

I often use this site when traveling and wish to stay abreast of uncommon/rare bird sightings....in addition to knowing where and when migrants (such as wood-warblers) are being seen.

Warbler Guy: What's a good web site for warbler songs? Songs of warblers are best heard on the web and who explains warbler calls and songs?

Here's where you should know about, James (in Vancouver):

http://www.xeno-canto.org

GR8 web site...Type in the name of the bird species you wish to hear and, amazingly, dozens of different recordings from acoustic birders appear. Explore the list by scrolling down to read descriptions of each recording, then click on the ones you wish to hear.

A fantastic online site related to bird song ecology and excellent articles is:

http://earbirding.com/blog/

Here, Nathan Pieplow, professional sound recordist and birder extraordinaire, features incisive accounts related to bird songs and calls.

One of his posts from 2/28/14 notes excellent news with the announcement that the Florida Museum of Natural History now allows users access to is large collection of bird sound recordings. To find it, go to:

http://www.flmnh.ufl.edu/bird-sounds/

To read more about bird song ecology, I recommend Dr. Donald Kroodsma's book The Singing Life of Birds. 

Lastly: I own a dozen or more other texts related to bird song ecology — some of which host peer-reviewed research articles and others that are intended for popular audiences. Please feel free to contact me at the following email # and I'll share a "resource" list of publications with you: danieledelstein@att.net

warblerwatch.com 
(features several bird-related articles, including my "Birding Tours" information in relation to guided trips I have led since the 1980s)