mertensia's Favorites

No kidding.

@joegiulian and @samwilhelm first observed and collected small Colletes males hovering around a patch of Kalmia angustifolia at this open, sandy site in the Pinelands during the last week of May. C. bradleyi had been on our radar, but this was somewhat earlier than we expected since previous records are from mid-late June. The male of C. bradleyi was formerly unknown, but it seemed to us that multiple features of these male specimens (fine, well-spaced punctures on scutum, carinate metapleural projection with testaceous rim) were reminiscent of descriptions of the female of C. bradleyi by Mitchell (1951) and Stephen (1954). The following day, @andrew_aldercotte and I visited the same site and observed multiple male Colletes, as well as females that appeared to be collecting pollen from Kalmia angustifolia (see photo). Male specimens collected on this day matched those collected previously at the site by Joe and Sam and females we collected keyed exactly to C. bradleyi following Mitchell (1951) and Stephen (1954). Highly distinctive in the field - overall impression much like other americanus-group Colletes, but somewhat duller and lacking basal hair bands on tergites; quite unique among the Colletes and general bee fauna active in our area at this time of year. Subsequent visits to other sites in the Pinelands have turned up several more female and male specimens, all collected in association with Kalmia angustifolia (alongside Andrena kalmiae and occasionally Colletes consors!). Full natural history writeup in the works...

A specimen recently discovered by Joe that was taken in Washington County, Maine, provides the first evidence that this species may occur more widely than previously thought. Moral of the story for beewatchers in the northeast US: scrutinize flowering Sheep Laurel, especially in sandy barrens habitats!

Perhaps even more interestingly, Joe and Sam also managed to collect several male specimens of an as-of-yet unidentified Epeolus visiting Kalmia alongside Colletes bradleyi at our "original" site on the date that they first observed C. bradleyi males; we have yet to find additional individuals of this Epeolus despite effort.

See observation of male here: https://www.inaturalist.org/observations/122250341
See observations of Epeolus here:
https://www.inaturalist.org/observations/122250342
and here:
https://www.inaturalist.org/observations/122250345

Additional DSLR photos of specimens tba

Streamside. Culm 36cm tall, culm leaves 15cm x 4.5mm. Terminal spike staminate, 8mm. Pistillate spike 20mm, ~8 perigynia. Pist. scale 2.5mm, rounded tip; perigynium 8mm x 2mm, prominent veins, glabrous, no beak, 2 teeth. Achene trigonous, 1.5 x .3mm, +3mm beak. Proximal bract sheath 22mm.

Does anyone know what this thing is or how it formed?!! Mass of pine needles about 10inches at the widest point. Seems to be a habitat for tiny things like snails and freshwater shrimp and things like that. There were four or five of them. I’m so curious!!!

ID based on findings by Clifton et al. 2019: "Almost all dead L. delicatula adults on tree trunks were killed by B. major (97%) and attached by fungal rhizoids." Full paper here: https://www.pnas.org/content/116/19/9178

This individual was found dead and has presumably been attached to the tree trunk for several months (since the previous fall when adults die off for the year).