[wisb] Immature vs. juvenile (no WI sightings)

  • From: Mike Duchek <mikeduchek@xxxxxxxxxxx>
  • To: <wisbirdn@xxxxxxxxxxxxx>
  • Date: Tue, 11 May 2010 22:06:53 -0500

Just a quick question: what is the difference between a juvenile bird vs. an 
immature, for eBird reporting purposes and otherwise?  I have seen young great 
horned owls here in our woods in Waukesha and was wondering if these should be 
considered juveniles or immatures?  So when does an immature bird become a 
juvenile (or vice versa, if I have it reversed)?


I also spent this weekend on Lake Kabetogama at Voyageurs National Park in far 
NE Minnesota.  I wasn't willing/able to drag my companions into too much 
hiking/birding, but did manage to hike a couple of the trails.  On the Echo Bay 
Trail just down the road from where we stayed I was treated to several gray 
jays, including at least 2 immature/juvenile birds.  Neat to see, as the 
immatures/juveniles are entirely black, besides being quite vocal.  I also find 
gray jays (and Steller's jays) to be a lot more approachable than, say blue 
jays.  Always neat to see these big birds so up close.


Was also neat to see a stuffed great gray owl and boreal owl at the visitors 
center, both of which I have yet to see in real life.


Thanks a lot,


-Mike Duchek, Waukesha, Waukesha Co.
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