Lake Forsyth, Banks Peninsula

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Posts: 1739
Joined: Fri Jul 03, 2009 10:43 am
Location: Christchurch

Re: Lake Forsyth, Banks Peninsula

Postby Jan » Tue Jun 29, 2021 6:59 pm

Andrew is not saying that perch numbers have gone down, more that fisherfolk are disturbing birds [Crested Grebe] that nest on those rivers, and their numbers have dropped significantly
Posts: 1931
Joined: Mon Dec 14, 2009 2:29 pm
Location: Christchurch

Re: Lake Forsyth, Banks Peninsula

Postby andrewcrossland » Fri Jul 29, 2022 3:52 pm

Hi team, the July census for Crested Grebe on lake Forsyth yesterday was 206 birds - the highest count for quite a few years - and 1 unidentified small grebe.

Also present were 31 Coot (a high number for Lake Forsyth), 331 NZ Scaup, 2 white herons, and 21 Caspian Terns.

This lake must surely rank as having one of the largest assemblages of diving birds in the country with Crested Grebes, Black Cormorants, Pied Cormorants, Little Cormorants, Little Black Cormorants, Spotted Shags (cool to see them swimming and diving amongst a Crested Grebe flock), Coot, Scaup, and Caspian Terns all present.

For folks wanting to look for the small grebe or count the Crested Grebe pop in its entirety, hopefully the map below will help......... They are usually in at least 2-3 flocks with scattered pairs in many locations. When counting beware the scores of cormorants also feeding and often mixed with the grebe flocks.

red dot = small grebe location with 60+ Cresteds in a flock yesterday

white polygons = the main crested grebe flocking sites

orange polygons the locations were Grebes are in 2's or 4's etc.

Forsyth grebe map.jpg
Forsyth grebe map.jpg (140.66 KiB) Viewed 152 times

and below is a map of the lake showing the scale. Its 7 km long and Crested Grebes seldom fly around the lake by day so there's a lot of water there for them to be feeding and rafting on. Early mornings are best for counts as the water is often like a mill pond. Here's a pic of how it was yesterday.

forsyth scope.jpg
forsyth scope.jpg (84.32 KiB) Viewed 150 times

forsyth 2.jpg
forsyth 2.jpg (131.62 KiB) Viewed 150 times

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