Hi Phil, I wonder if your friend has house wrens or English sparrows breeding on the property. Both species can be very intolerant of any nesting species. At a nearby farm, they actively trap English sparrows because they were either piercing eggs or killing nestlings. I've had house wrens destroy the nests of phoebes and chickadees - both nests with eggs and those with nestlings.
On Thu, Jul 30, 2020 at 4:49 PM 'Phil Brown' via NHBirds < <nhbirds...> wrote:
> Birders, > > Sharing the observations of a friend in Unity, NH, who reports the > following: > > "We had at least 3 active barn swallow nests, 2 in the barn and 1 on the > porch. I watched the one on the porch very closely. It had 5 chicks. This > week, I found all 5 dead on the floor over the course of 3 or 4 nights. > Both parents were very active in feeding. Everything appeared normal to me, > and I wasn't surprised that all 5 didn't make it, but to lose them all > seems strange. The nests in the barn each had loss as well. Any idea whats > going on? The porch nest had at least 1 chick that clearly had the most > vigor and it was often leaning out over the edge. Very sad." > > A few of us have been speculating about what may have been going on and > have considered several possibilities (predation, starvation, drought, food > contamination, parasites, etc.) but none seems a perfect fit for what was > observed. > Curious to know if anyone else has noticed anything similar this summer or > in the past, or might have an idea about what was going on here. > > Thanks for any input. > > Phil Brown > Hancock, NH > > -- > To Change your e-mail delivery settings (digest, daily, no mail) visit: > https://groups.google.com/group/nhbirds/subscribe?hl=en > --- > You received this message because you are subscribed to the Google Groups > "NHBirds" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to nhbirds+<unsubscribe...> > To view this discussion on the web visit > https://groups.google.com/d/msgid/nhbirds/<17405842.8152704.1596142190987...> > <https://groups.google.com/d/msgid/nhbirds/<17405842.8152704.1596142190987...>?utm_medium=email&utm_source=footer> > . >