Posts tagged with tree nettle

Cuckoos and their toxic prey – ‘urticated’ inside and out

  • Shining cuckoo. Photograph by Nathan Hill, New Zealand Birds Online
  • SC_SW53098
  • Red admiral butterfly caterpillar (pale morph). Photograph by Norm Twigge
  • Red admiral butterfly (Vanessa gonerilla). Photograph by Colin Miskelly, Te Papa

Cuckoos can stomach toxic caterpillars, but it appears they are also impervious to being stung externally, as bird expert Colin Miskelly discovers. A previous blog on this topic referred to shining cuckoos seeking out and eating prey that are toxic to other birds – including caterpillars with urticating hairs. ‘Urticating’ refers to hollow spines that… Read more »

Is this the world’s biggest nettle leaf?

Ongaonga leaf - note the ruler starts at 500 mm.

Whilst recently chasing seabirds on Titi Island we came across tree nettles (ongaonga, Urtica ferox) with super-sized leaves. The largest leaf we measured was 28 cm long, much longer than the maximum leaf length of 18 cm given for this species in the Flora of New Zealand. Perhaps the abundant seabird droppings on this island… Read more »