When is the New Zealand Blowfly most available to trout?

November–March, typically 11:00–16:00. It picks up from about 13°C, peaks around 18°C and tails off by 25°C.

What flies imitate the New Zealand Blowfly?

Black & Peacock Spider, Blowfly, Yellow Humpy, Blue Bottle, typically on a #14–12 hook.

How big is the New Zealand Blowfly?

Adult stage: 8–12mm. That matches a #14–12 hook.

Terrestrial · Terrestrial

Blowfly (NZ)

Lucilia sericata

Size

8–12mm

Hook size

#14–12

Hatch window

Season November–MarchPeak time 11:00–16:00

Water temperature

18° peak

13°25°

How fish feed on it

Nothing about a beetle or an ant belongs in the water, which is rather the point — once it's in, it isn't getting out, and a trout that's spent all summer learning this doesn't need convincing twice. The takes tend to be confident and unhurried, especially along undercut banks and under overhanging branches where windfall has been landing for as long as the tree's been there.

Flies that imitate this

Black & Peacock Spider

Blowfly

Yellow Humpy

Blue Bottle

Ecology

Rivers & stillwaterFreestone rivers

Where you'll find this

New ZealandPresent

Present throughout

About the genus Lucilia

The common green bottle fly ( Lucilia sericata ) is a blow fly found in most areas of the world, and the most well-known of the numerous green bottle fly species. It is 10–14 mm long, slightly larger than a house fly, and has brilliant, metallic, blue-green or golden coloration with black markings. It has short, sparse black bristles (setae) and three cross-grooves on the thorax. The wings are clear with light brown veins, and the legs and antennae...