03-15-2023, 01:11 PM
Michelle, I will e-mail you so we can make arrangements to meet.
Originally, I placed six dipper nest boxes on the South St. Vrain and three on the Middle St. Vrain. Only two boxes remain on the South. Of the more that 30 dipper boxes I have mounted on streams around Colorado, most are still producing young 35 years later. On our resource rich mountain streams the main limiting factor for dipper populations is the lack of suitable nest sites. The boxes help fill the gap and act as a population sink.
Here are 2022 images of active nests on the South at Sourdough and at Ceran St. Vrain. Adults were feeding young at both nests on June 9. On that date, adults were feeding and later fledged 9 young from two of the three boxes on the Middle. Dippers were also feeding young at the active nest box in Jamestown on June 9th last year.
Originally, I placed six dipper nest boxes on the South St. Vrain and three on the Middle St. Vrain. Only two boxes remain on the South. Of the more that 30 dipper boxes I have mounted on streams around Colorado, most are still producing young 35 years later. On our resource rich mountain streams the main limiting factor for dipper populations is the lack of suitable nest sites. The boxes help fill the gap and act as a population sink.
Here are 2022 images of active nests on the South at Sourdough and at Ceran St. Vrain. Adults were feeding young at both nests on June 9. On that date, adults were feeding and later fledged 9 young from two of the three boxes on the Middle. Dippers were also feeding young at the active nest box in Jamestown on June 9th last year.