On May 26, I observed the same female Eastern Bluebird who successfully raised three fledglings this spring starting a new nest in one of my birdhouses. I’ve followed her progress throughout the season, and just a few days ago, I wrote about her feeding one of her young fledglings in my yard (Eastern Bluebird Fledgling Feeding Continues in My Yard).
A New Male Bluebird Arrives and Shakes Things Up
Over the past few days, a male Eastern Bluebird has moved into the area. I’ve seen him visiting the birdhouse often, peering inside and calling out to the female. However, his behavior has been disruptive. He’s chased the female and even harassed her three fledglings.
On May 26, only one fledgling came to the feeder, and I didn’t see the female feeding it. The male soon chased it away. While this might seem aggressive, it’s actually a normal part of Eastern Bluebird behavior. Males often drive off fledglings when the female starts preparing for a new brood. It’s part of securing the territory and redirecting energy to the next nesting cycle.
Nest Building in the Rain
Later that same rainy day, I watched the female begin building her new nest. She was carrying wet pine needles into the birdhouse. At first, it surprised me that she would gather nesting material during rain and use it while still damp. I worried it might promote mildew or be unsuitable for a healthy nest.
I later learned that this is completely normal. Bluebirds and other cavity-nesting birds often collect materials from the ground, where pine needles are naturally damp after rain or morning dew. Pine needles are a favored material because they dry quickly, drain well, and are easy for the bird to shape into a sturdy nest.
So, even though it looked concerning at first, this behavior is part of a bluebird’s well-honed nesting strategy.
What’s Next for This Bluebird Pair?
I’ll keep watching to see how the male behaves as the season continues. While male bluebirds don’t help with nest construction, they often take on a protective role. His job now is to guard the territory and ensure the safety of the nesting site and the female.
I’m also keeping an eye out for the three fledglings. Being chased from the area is a natural but challenging part of their development. This moment marks a transition from one brood to the next, offering a glimpse into the bluebird’s fascinating life cycle.
FAQ
What kind of nesting material do Eastern Bluebirds prefer?
Eastern Bluebirds often use pine needles because they drain quickly and are easy to shape. Even if wet, they dry fast inside a birdhouse.
Why is the male bluebird chasing the fledglings?
It’s common for male bluebirds to chase fledglings away as the female begins building a new nest. This helps them secure territory for the next brood.
Is it okay for birds to build nests in the rain?
Yes, birds often gather materials in wet conditions. Damp pine needles are not harmful and typically dry out as the nest progresses.
Should I be worried if I only see one fledgling?
Not necessarily. Fledglings may scatter or be temporarily out of sight. Some may also be driven off by territorial adults.
Will the male bluebird help build the nest?
Male Eastern Bluebirds usually do not help build the nest. Their primary role early on is guarding the territory and pairing with the female.
Steve, at least the new male bluebird isn’t as aggressive as a male lion, which kills cubs from a previous litter. I’ve really loved hearing about the Eastern Bluebirds in your garden and I’m looking forward to any new developments.