The one week old Boise eyasses are being fed mostly by mom 7 to 8 times every 24 hours at 2-3 hour intervals and they seem to be growing quickly. Dad has been a good provider, but sometimes his preparation is not up to mom’s finicky cleaning specifications. The eyasses have started preening and stretching their wings when they are not begging for food or sleeping in a contented huddle. Their elimination habits of squirting away from the center of the scrape have delighted viewers of the live cam. The ambient air temperatures have allowed the parents to leave them alone for longer periods of time. When it is colder than 60 F, she tries to cover them all. She has to almost mantle them with her wings to include them all underneath her close to her brooding patch. Dad has tried to sit on them, but always looks too small and uncomfortably overwhelmed by that daunting task.
We have lots of migrating songbirds coming through Boise. Hundreds of Western Tanagers have been spotted all around the Treasure Valley. The pigeon population has been avoiding downtown.
The following information is courtesy of Kate St. John in Pittsburgh, PA.:

We take for granted that nestling peregrines are always healthy but sometimes they catch a parasite from the birds they eat. One of the Harrisburg,PA chicks was found to have an infected throat at banding last week and is being treated at their bird infirmary with antibiotics and watched closely before he can be returned to the nest box.

Avian trichomoniasis (Trichomonas gallinae) is a protozoan that infects mostly pigeons and doves but can be caught by the raptors who eat them. It’s generally a disease of the young and can be fatal because its lesions block the throat of the victim until he starves. In young birds this happens rapidly. In the few older birds who become infected, the lesions may invade the jaw, causing holes in the jawbone. Interestingly, these holes were discovered on T. rex fossils and established another link between dinosaurs and birds.


One comment

  1. From Robert Mortensen:Thanks for the regular peregrine updates on your blog. One little correction for your recent post…the tanagers being seen in the Treasure Valley are Western Tanagers. I believe there is only one record of Scarlet Tanagers in Idaho from a few years ago at Camas NWR in eastern Idaho.


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