Table 5.2 – Active Ardeid Night
Roost Survey Findings
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Date: 19 October 2021
Sunset Time: 17:55
Tidal
Condition: Low Tide |
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Pre-roost
Period |
Final roost
Period |
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|
Time of
Return: |
Chinese Pond Heron Ardeola bacchus, Great Egret Ardea alba and Little Egret Egretta garzetta (16:55) |
Time of
Return: |
Chinese Pond Heron Ardeola bacchus (18:03) |
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Parameters |
Location |
Parameters |
Location |
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|
ANR1 |
ANR2 |
ANR1 |
ANR2 |
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|
Pre-roost
Aggregation (Y/N): |
Y |
Y |
Substrate
Species: |
Sonneratia apetala and S.
caseolaris |
Sonneratia apetala and S.
caseolaris |
|
|
Substrate Species: |
Sonneratia apetala and S.
caseolaris |
Sonneratia apetala and S.
caseolaris |
Substrate
Height (m): |
Approx. 5 m. |
Approx. 3-4 m. |
|
|
Substrate
Height (m): |
Approx. 5 m. |
Approx. 3-4 m. |
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Ardeid
Species Composition |
Abundance (individuals) |
Ardeid Species
Composition |
Abundance (individuals) |
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|
ANR1 |
ANR2 |
ANR1 |
ANR2 |
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|
Chinese Pond Heron Ardeola bacchus |
3 |
5 |
Chinese Pond Heron Ardeola bacchus |
14 |
6 |
|
|
Great Egret Ardea alba |
5 |
9 |
|
|
|
|
|
Little Egret Egretta garzetta |
7 |
15 |
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|
|
|
|
Breeding
Activity (Y/N): |
ANR1 |
N |
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|
ANR2 |
N |
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Notes: Pre-roost
Period: Period when avian
individuals gather first before flying into a night roost ANR1:
Active ardeid night roost area east of the Project boundary ANR2:
Active ardeid night roost area northeast of the Project boundary *:
individuals aggregated on the exposed mudflat -: not
recorded |
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