Category Archives: Animals

Black and yellow mud dauber wasp

A black and yellow mud dauber wasp
The black and yellow mud dauber (Sceliphron caementarium) is one of several mud dauber wasps. They’re large, quite common, and get their name from the mud nests they build. These nests are often attached to man-made structures, such as under the eaves of houses. They’re not aggressive, but are prone to startling me since they spend a good deal of time around the outside of the house.

Bee on fireweed flower

A honey bee on a fireweed flower on the Big Island

Last week I posted here about the fireweed biocontrol moth, secusio extensa, which has been introduced into Hawaii in an attempt to control the spread of invasive fireweed (Senecio madagascariensis). On that same walk I saw lots of fireweed flowers such as this one, busily being helped to propagate by this bee. Such is the battlefield.

Hawaiian blue butterfly

A Hawaiian blue butterfly in the Big IslandA Hawaiian blue butterfly in the Big Island
The Hawaiian Blue butterfly (Udara blackburni) is also known as Blackburn’s Blue butterfly, Blackburn’s Little Blue butterfly, and the Koa butterfly. It is one of two butterflies that are endemic to Hawaii (the other is the Kamehameha butterfly). The caterpillars feed on Acacias, including Koa leaves, hence one of the names. It’s a small butterfly, only an inch or so long, but quite striking.

Secusio extensa – fireweed biocontrol moth

A Secusio extensa moth on a yarrow plant.A Secusio extensa moth on a yarrow plant.
While out on a walk, I came across a patch of yarrow (Achillea millefolium) and thought the patterns made by the flowers would make a good photo. So I chose an individual plant to focus on and by good fortune found this moth hanging off the side.

The moth is Secusio extensa (I’ve also seen it referred to as Galtara extensa) and it hails from Madagascar. While this begins to smack of another invasive species, in fact this moth was deliberately introduced to the Hawaii in 2012. The reason for that is that the moth’s larvae feed on fireweed (Senecio madagascariensis) and fireweed is a truly bad invasive species here. Besides spreading in a prolific manner, it’s poisonous to livestock.

What I particularly liked about this individual was that it appeared to be enraptured by the yarrow plant, bobbing its head up and down continuously. I also loved its comb-like antennae, which are more properly known as pectinate antennae.