http://www.ustream.tv/recorded/57746729/highlight/594763GHO's try to take the nest! Check it out!!
Sunday Night Owl Visit and Response
We've had a lot of people ask how Mom and Dad would respond to great horned owls in their nest. On Sunday night, we found out when an owl visited the nest and an unknown P chased them off around 12:07AM CT. Thanks to baziunc for the heads up and highlight!
The highlight begins with two owls pair-calling. According to Karla Bloem from the International Owl Center, the onscreen owl is a male and the off-screen owl is a female. At 28 seconds, the owl jumps to the crib rails and we hear eagle vocals shortly afterwards. At 41 seconds, an angry eagle flies in and chases the owl off. Very shortly afterwards, an owl (the original owl? Its mate?) strikes the eagle, knocking it off the nest.
ome context. The owl flew into the nest about 14 minutes before the eagle did, although eagle vocalizations began about one minute after the owl landed. We hear an eagle, another owl, and a crow or two during the 14 minutes the owl explores the nest, although true pair calling doesn't begin until 8 and-a-half minutes into the owl's visit. The moon had waned to just a sliver and the night was cloudy, making things very dark. This might account for the delay between the initial vocals and the nest defense, although pair-calling might also have played a part. Whatever the reason for the delay, the eagle displayed an incredible amount of tenacity and skill when it flew into the nest under pitch-black conditions.
So how do eagles and great horned owls compare size-wize? While great horned owls have special night-time adaptations that help them see under very low-light conditions, bald eagles are considerably larger.
GHO
Average wing-span: 48 inches
Average weight: 3.7 pounds
Bald Eagle
Average wing-span: 83 inches.
Average weight: 10 pounds
It looks like the owls aren't going to take over N2. It remains to be seen whether the owls nest in the neighborhood, which they seem determined to do. We may try leaving the camera on N1 for an evening to see whether we see or hear them there.