[updated 11 05 2016]
You can use a mobile phone to set up a streaming (ie direct live internet) broadcast of whatever the phone mic picks up. Obviously this means you need a phone signal where you are broadcasting from.
The best streaming app is the free Locuscast for iPhone or Android – details and download here http://locusonus.org/locustream/ First open an account at Locus Sonus and your microphone will appear on the soundmap here http://locusonus.org/soundmap/
[When my mic is live it is called ‘nightingaler’ and appears on the map at http://locusonus.org/soundmap/051/ . After it’s closed down it still appears for a bit but greyed out. Live mics are orange and have a click-on menu with ‘stop’ ‘start’ play symbols like a video or sound recording. Seems to work best on larger screens. An alternative is to try and connect directly with my stream at http://locus.creacast.com:9001/mobile_nightingaler.ogg – if it’s live it should work, if it’s not, you see a ‘404’ message].
You should get better results with an external mic but it is not essential.
You can use this adpator to bring sound into iOS or Android phones http://www.amazon.co.uk/dp/B00L6C8PN0/ref=pd_lpo_sbs_dp_ss_1?pf_rd_p=569136327&pf_rd_s=lpo-top-stripe&pf_rd_t=201&pf_rd_i=B00C3KXJ8K&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=0PYKV8NBB7KQRNH7B7FE. You can direct plug mics such as the excellent ones from Felmicamps here http://micbooster.com/primo-microphone-capsules/65-clippy-em172-microphone.html
This setup will give you a mono signal. With an iPhone 6 you can stream in stereo. This requires an adaptor such as the ones here http://www.ikmultimedia.com/products/cat-view.php?C=mobile
I bought a cheap android phone specifically for this purpose and it works well with the above microphones (remember to buy a wind baffle or use an old sock or material from a pair of tights): http://www.argos.co.uk/static/Product/partNumber/3924918.htm?cmpid=COJUN&catalogId=10001&cjsurferid=877703327559280495%3AG.u86BDWB..a&DM_PersistentCookieCreated=true&_%24ja=tsid%3A11674|prd%3A1546795&storeId=10151&referredURL=http%3A%2F%2Fwww.argos.co.uk%2Fstatic%2FProduct%2FpartNumber%2F3924918.htm&referrer=COJUN
Soundcamp May 1 ‘dawn chorus’ event:
Press release http://soundtent.org/2016/soundcamp_2016_announce.html
Events announce http://soundtent.org/soundcamp_visit.html
[If you have wifi and or power on site eg in your garden a more sophisticated approach is to use a raspberry pi or other equipment so you can leave it on all the time if you like – see the Locus sound website]