Definition of DY in Aust Wood Ducks

To: CanberraBirds <>
Subject: Definition of DY in Aust Wood Ducks
From: David McDonald <>
Date: Tue, 22 Jan 2008 17:21:02 +1100
Greetings. I'm wondering when young Aust Wood Ducks cease being 'dependent young' for the purposes of recording data for our surveys.

Specifically, at present we have a family here, mum and dad and 7 teenage young. They young are about the size of their parents, obviously they feed themselves as they walk along, but they are very much still the family group, with one parent at the front and one at the back as they walk along in single file.

So, they can graze OK - they are not fed by the parents which is what I normally use as an operationalisation of the DY concept - but are still looked after by the parents.

Any thoughts? Any clear guidance available form data set managers?

Thanks - David

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