Different Type of birdnest found near BH

Noticed 2 different bird nest in the under floor of my BH. Will this bring harm to the BH?

Visited BH last Saturday (6 June 2009), found 4 baby bird bodies and a small peice of bird nest (new brid nest) on the floor. Suspect BH temperature too high and low humidity. Started to using the data logger to check the BH condition, hope able to improve the condiction.