By adding monofilament fishing line properly to the front of a bluebird nest box, you can discourage House Sparrows from using it. The theory is that they are afraid is spider webs. It does need to be the right size line and installed properly to be effective.

Mark McKellar is a wildlife biologist with over 35 years of bird study experience. He has a degree in Fish and Wildlife Sciences from North Carolina State University and has worked for the Department of the Army, the Wildlife Departments of North Carolina and Missouri. He ran nature centers for many years in Missouri and Pennsylvania before buying the Backyard Bird Center in the Northland area of Kansas City. Mark has led hundreds of bird hikes both locally and abroad. He has taught classes about birds and other wildlife to groups of all ages and brings that knowledge to the customers of his retail business every day. More information about Mark at https://backyardbirdcenter.com/about...
#marksbackyardbirds, #bluebirds, #birdnest

Unlock the secrets of the birding world with my FREE Bird Watching Journal! Whether you're a seasoned bird watcher or a curious beginner, our journal is the perfect tool to help you track your sightings and deepen your knowledge.

Download your FREE copy now at https://bit.ly/43LK0Hb and take the first step on your journey to becoming a true birding expert.

FOLLOW
Facebook:   / backyardbirdcenter  
Instagram:   / marksbackyardbirds  
Join our monthly email club: https://backyardbirdcenter.com/signup

Join our FREE Facebook Community Group:
  / 1055480298992527  

SUPPORT
Visit our website: http://backyardbirdcenter.com
Shop our online store: http://shopbackyardbirdcenter.com

MORE INFORMATION
Contact: [email protected]

Chapters
00:00 Introduction
00:37 Theory
01:38 The Trick
03:16 Demonstration

Some product links are affiliate links which means if you buy something we'll receive a small commission.
Mark's Amazon store:
https://www.amazon.com/shop/marksback...