Observaciones de martinlucas

A medium sized fly nectaring on Prunus americana. I planted them, but they were collected (with permission) from a nearby native population at risk from mowing. A somewhat bold ID, but I've previously photographed two other this time of year fairly nearby and it seems quite distinctive.

A small Andrena male visiting Amelanchier blossoms in my garden. The bush is 'in cultivation', sort of I suppose, but I collected it from the wild and planted it in appropriate habitat so I doubt that's of great relevance. This is a single bee - the photos aren't great due to the strong winds at the time. It reminded me of Andrena nuda, but I was unable to find any photos of a male. The bot suggested Andrena miserabilis, but I don't see the distinct yellow face.

A fly (about the size of a house fly) visiting snowdrop (galanthus) blossoms under an old black oak (Q. velutina) in my front lawn on an unusually warm late February day. The fly is rather hairy and shows some silvery shine markings on its abdomen when the light hits it just so. Also some similar markings on its face. Possibly a blowfly of some kind.

In the shallow, clear waters of Betty's Pond - fishless, groundwater fed, sand bottom. I'm unsure of the suggested ID, even as broad as it is. I'd estimate size about 6-8mm. As is my custom, these are 'no-touch' photos with minimal disturbance to the subject.