Not sure about HBW's "mainly crepuscular and nocturnal but sometimes
active on overcast days". While this applies obviously for all Ixobrychus
species, in my own experience (having observed all the world's Ixobrychus
species but Schrenck's), YB is the easiest to see out in the open in the
middle of the day.
Nikolas
A/Prof Nikolas Haass | Head, Experimental Melanoma Therapy Group
The University of Queensland Diamantina Institute
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On 13/07/14 10:44 AM, "Andrew Thelander" <> wrote:
>Hi all
>
>Have readers pondered the possibility that the North Lakes Yellow Bittern
>could have been hatched in Australia? According to the Handbook of World
>Birds, the YB extended its breeding range westwards (with the discovery
>of nests in Egypt last year). Could it be that it is also making a
>southward push? Yes, this is 100% speculation until evidence of nesting
>is found here. But northern Australia is a big place and possibilities
>abound.
>
>Regarding behaviour, the Handbook also says that the YB is "mainly
>crepuscular and nocturnal but sometimes active on overcast days." By all
>accounts, the North Lakes bird does not fit this description as it has
>been observed being very active during the day in full sunlight. If the
>bird has been active at night, who knows how far it has ranged over the
>local area, perhaps returning to roost at Wallaroo Circuit with its
>substantial reed cover.
>
>Food for thought.
>
>Regards
>Andrew
>
>
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