Saturday 7 September 2019

Blaencaerau Devils-bit Scabious patch

It's the time of the year when hoverflies start to die off rapidly and are all but gone by early October. But not today due to the cool fine weather I recorded 26 species albeit in mainly small numbers on the DBS patch near the stream coming down through the forestry. Ferdinandea cuprea was new for the year, but more importantly it was my 100th species for the Blaencaerau 1km square, the second square in the valley following in the footsteps of Garnwen in 2018. Eristalis tenax (110) was the most numerous whilst there were good records in the form of Rhingia campestris (14), Rhingia rostrata (1), Eristalis intricaria (2), Sericomyia silentis (9), Volucella bombylans (1 late record) and Volucella pellucens (1 latish record).

I was so busy searching the DBS (possibly a 1000 flower heads) that I didn't see many other insects except 7 species of butterfly headed by Small Copper and a migrant Silver Y moth.

 Part of the Devils-bit Scabious patch, which is about 300mts by 100mts in size.
 Small Copper
 Eristalis horticola
 Eristalis intricaria
 Rhingia campestris
 Sericomyia silentis
 Volucella bombylans - late record
 Volucella pellucens
Ferdinand Cuprea - a species rarely seen, it has a symbiotic relationship with the Goat Moth, its larva live in the wound/sap runs of trees caused by the infestation of Goat Moth larva, which is a species not yet recorded in the valley, so I'll be keeping an eye on the nearby trees next year.


3 comments:

Paul tabor said...

worth u checking the hurling fields by cemetery mart scabious covers the whole area from the railway line up to junction at cwmdu lots of hovers there and ivy is in flower at cemetery but im struggling to get up there due to work

Martyn Hnatiuk said...

I'll be starting doing the ivy this week, went there last week and it was just starting to open. The DBS up with me is proving to be very good this year, but the water mint has been overgrown by Himalayan balsam and is now lost. Japanese Knotweed I used to visit seems to all have died off, which I suppose is a good thing for our local flora.

Paul tabor said...

knotweed still in flower at back of cemetery too but hurling fields definitely worth a visit im working most Saturdays so dont get a chance