Try lifting the nest and see if there are fly larva at the bottom of the nest. The summer broods in my boxes used to fall prey to these blood suckers. If so, clean the nest out use some parrot spray from the pet store on the interior. I lift my nests gently and brush out the larvae on a weekly basis. This keeps the population low enough for the nestlings to handle without spraying until they fledge. I then clean and spray the box between nestings. If it is just the heat, try attaching something to the box that would shade it in the afternoon. The time is getting tight but they may try again. Kevin
----- Original Message -----
From: Lee Allaben - Century21 Advantage<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Wednesday, July 13, 2005 5:57 PM
Subject: [VTBIRD] bluebird nestlings dead
i've tried for five years to get bluebirds to nest in one of my boxes. This year they did and had 4 eggs hatch. The nestlings were just over a week old. I checked them two days ago and they were fine. This afternoon, after setting out some mealworms, I checked the box and all four were dead. There is no sign of disturbance. They were very pale brown in color. Is it possible the heat killed them? Is it too late for the adults to nest again?