1) Limosa Holidays, UK, www.limosaholidays.co.uk

2) Zoothera Biridng, UK , http://www.zootherabirding.com/

3) BirdFinders Tour,UK http://www.birdfinders.co.uk

4) Steve & Gina Sunrise BIRDING and WILDLIFE TOURS,USA http://www.sunrisebirding.com

5) Eagle-eye Tours, Canada and US http://www.eagle-eye.com

6) Bellbird Birding Tours, Australia, http://www.bellbirdtours.com

7) BirdingEcotours, South Africa http://birdingecotours.com

8) Rockjumper Worldwide Birding, South Africa http://www.Rockjumperbirding.com

9) Alphine Tour, Japan, http://www.alpine-tour.com

10) Birdnet, China (鸟网)，http://www.birdnet.cn

11) Birding With Santtu Ahlman, Finland. http://www.santtuahlman.fi

12) Birding With HUGUES DUFOURNY, BELGIUM

13) Wings Worldwide Birding Tour http://www.Wings.com

14) Calidris Birding Tours,UK. https://calidrisbirdingtours.com/