Based on the 'Dark and light interiors' blog post, what were the key findings regarding Swift preference for nest box interior color and chamber usage? Additionally, if I wanted to join the Swifts Local Network (SLN) to share my own conservation efforts, what is the primary email address to contact the group owner?
Navigate to the main blog page of actionforswifts.blogspot.com. Locate and read the 'Dark and light interiors' blog post. Identify the conclusions drawn from the experiment regarding black vs. unpainted interiors and left vs. right chamber usage. Navigate to the 'Swifts Local Network (SLN)' page. Locate the email address for contacting the SLN group owner to join the group. Synthesize the findings from the blog post and the SLN contact email.
State that the experiment found little point in painting the inside of Swift boxes black, as there was no significant preference for black interiors over unpainted ones (8 pairs in painted, 8 in unpainted). State that Swifts used the left chamber vs. the right chamber in a ratio of 9:7. Provide the email address 'swiftslocalnetwork+owner@googlegroups.com' as the contact for joining the SLN group.