Hylaeus in Hawaii

Hylaeus strenuus

Islands: Oahu

Locations: None

Habitats: Coast, lowlands, montane

Plants: Erythrina, Metrosideros, Scaevola

Xerces: No info.

Insects of Hawaii:

Insects of Hawaii Volume 17PDF

UH/DOD: In 2007, a new immigrant Hylaeus was reported from Oahu, and later identified as Hylaeus (Indialaeus) strenuus (Dathe 2011, Magnacca et al. 2011). The initial collections were strictly from coastal sites in the east Honolulu area, primarily on Scaevola taccada, and it was expected to be a potential serious competitor to the native coastal Hylaeus. Since then, it has spread throughout the island. At present, its habitat preferences are difficult to discern (all Indialaeus species are virtually unknown in their native range). In this survey, it was found at the coast broadly along Mokuleia beach, east of Kaena, and at Sandy Beach and Kaloko, near the H. anthracinus populations. Two collections were made on Metrosideros polymorpha flowers on adjacent ridges in the central Koolau range, indicating the potential to invade montane habitats. However, it was not recovered from some of the earlier sites where it was found, including Ala Moana Beach Park, suggesting it may not be competitive in these habitats. At the same time, it was consistently found at Erythrina flowers, both the native E. sandwicensis (wiliwili) and various introduced ornamental or cultivated species. These flowers are clearly evolved to be bird-pollinated
Hylaeus near military landsPDF


 Flickr Images of H. strenuus

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Images and information mostly from various works by Karl Magnacca.
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Starr Environmental