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Video courtesy of @FOBBVCAM friendsofbigbearvalley.org
The opinions presented do not necessarily reflect the opinions of FOBBV.
After spending almost 6 hours on the nest, Shadow graciously delivers a fish for Jackie, all the while being chased by a Sub-Adult in an apparent attempt at kleptoparasitism.
Kleptoparasitism - stealing food or prey from another animal. Young eagles (and let's be honest, Adults too!) do that a lot.
The visitors has a rugged, uneven wing feathers. This suggests they have only molted once and likely hatched in 2022.
There is no way to tell definitively whether this is Spirit or not, because Spirit was not banded. There is also no definitive research into whether adult would recognize their returning offspring. Territorial adults would likely treat them as intruders, even more so during the nesting season.
The best thing we could do is to determine whether the bird is of the appropriate age group, i.e. #CouldBeSpirit.
ℹ️Raptor Vocab 101: Aging🪶Juvenile = 1st year, Sub-Adult = between Juvenile & Adult, Immature = either Juvenile or Sub-Adult, Adult = Definitive plumage bit.ly/3tcOWHe
🥚Egg1 was laid 1/25 16:55 bit.ly/48OfNt5, Egg2 was laid 1/28 13:59 bit.ly/3OkpEi7, Egg3 was laid on 1/31 17:58 bit.ly/3SGTwb5 .
It is unlikely that the eggs will hatch at this point. We have no way of knowing why. It could be environmental, such as temperatures, humidity percentages, oxygen levels at high altitude, etc. It could be biological with something just being off at the time the eggs were created. It is very unlikely that either Jackie or Shadow are infertile since they have already had 2 sets of chicks together - in 2019 and 2022.
When eggs don’t hatch, Jackie and Shadow may start withdrawing from incubation eventually (they usually over incubate for several weeks, details can be found in our Activity Log). Withdrawal is always a process and it happens gradually with longer and longer breaks. Shadow may be a little bit more stubborn than Jackie (this is something we have observed in the past). Left unattended, the eggs may eventually be scavenged by ravens or other animals. The nest cameras are live 24/7/366 weather and maintenance permitting.
ℹResident Bald Eagle male: Shadow (unbanded) since May 2018. Estimated hatch year: 2014
ℹResident Bald Eagle female: Jackie (unbanded) since September 2016. Estimated hatch year: 2012
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