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Haemphysalis longicornis (Bush Tick)

Distinguishing features

Haemaphysalis longicornis, Lower Blue Mtns NSW 2005; source NF Body oval, dark brown to dark blue-grey all over.

Scutum broadly oval and somewhat fan-shaped (narrower at front).

Capitulum short, wider towards scutum.

Legs dark red-brown, all the same colour cf. Ixodes holocyclus (Paralysis tick) where 1st and 4th pairs of legs darker than 2nd and 3rd pairs.

 

Haemaphysalis longicornis, Lower Blue Mtns NSW 2005; source NF First legs close to snout (distance between snout and 1st pair less than half that between 1st and 2nd pairs) - cf. Boophilus microplus (Cattle tick) where distance larger.

A line from base of capitulum through points at base of each pair of legs forms an arc - cf. Ixodes holocyclus (Paralysis tick) forms a straight line.

No anal groove apparent anterior to anus - cf. Ixodes holocyclus (Paralysis tick).

 

Haemaphysalis longicornis, Lower Blue Mtns NSW 2005; source NF  

Description

Body oval, dark brown to dark blue-grey all over. Short capitulum, wider towards scutum. Legs dark red-brown; first pair close to snout. Scutum broadly oval and somewhat fan-shaped (narrower at front). Capitulum short, wider at face. Legs dark red-brown. Haemaphysalis spp have palpi with flared second segments. Like Ixodes spp, these ticks lack eyes, but they differ in having festoons and a posterior anal groove.

Distribution

Significance

Found coastal NSW and QLD, common on cattle, horses and dogs. Introduced from northern Japan, it was first recognised in 1901 in northeastern NSW.

It is a livestock pest in coastal regions, building to great numbers in favourable seasons. It causes losses in production. Nymphs and adults first seen early in spring. Adults are most numerous in spring and summer. Larvae follow in late summer, nymphs in early autumn. Mainly affects cattle, deer, horses, donkeys and dogs, but also infests sheep, goats, pigs and humans. In cattle, "tick worry" lowers production and tick bites damage hides. In horses there is tick worry and skin irritation. In other animals tick worry also occurs.