Visiting the Arboretum: All members and visitors need to make a reservation in advance of their visit to the Minnesota Landscape Arboretum. We hope to see you soon!
By Patrick Petersen
If you have been checking the Arboretum’s Live Osprey Cam, you no doubt have noticed two eggs being incubated (brooding) by an adult Osprey. The first egg was laid May 15 and the second egg was laid on May 18. We’re watching for a third egg that might be laid any time now.
Though many have asked, these eggs were not laid too late to be successful. According to Vanessa Greene of the Twin Cities Metro Osprey Watch, the male in the nest is new this year “so it always takes time.”
Greene says that “older, established, experienced pairs are always the first to lay eggs, but when one of them doesn’t return, it can take extra time to find a new mate and get down to business.”
Greene notes that there was a second, unbanded male at the nest for a while so things had to get sorted out. The female had to pick a partner and then laid the eggs.
“We have had ospreys lay eggs as late as the very end of May and still fledged chicks successfully. We have some other pairs in the area that have not laid eggs yet – and maybe they won’t – but I don’t give up until June.”
According to Greene “given the competition between the two males at the Arb’s Osprey Cam nest, we will see if all eggs are fertilized. I suspect we may see a third egg laid Friday, May 21. I can’t guarantee that all of them will hatch, but I can say that other pairs that have laid eggs this late have been successful in the past.”
According to the Cornell Lab of Ornithology, osprey typically incubate their eggs for 36-42 days, so if all goes well, the eggs might be hatching the week of June 20.