How many berries?

November 12th 2016

Ripe Rowan Berries. Photo D. Haines
Ripe Rowan Berries. Photo D. Haines

Given the huge influx of winter thrushes this year I wondered just how many berries might be available to them.

One of the smaller rowan trees in my garden, which will be 50+ years old, measures 7m tall, 5m across and has a trunk 25cm in diameter. On 10th November 2016 I counted 800+ clumps of berries on this tree and a sample of 5 clumps yielded 280 berries weighing 97gm. In round figures then the total crop of berries on that tree could be 44800, weighing around 16kg!

All measurements, other than the count and weight of the sample, are approximations, but that is still a lot of food for fieldfares and redwings, given the large number of rowans in Assynt (think of a number!).

Ian M. Evans

Report a Sighting

Recent Sightings

Risso's Dolphin

Five animals c. 6km off Stoer Head Lighthouse (DAH) (19/06)

Common Dolphin

Seven animals c. 4km off Stoer Head Lighthouse (DAH) (19/06)

Common Blue Butterfly

Single butterfly in garden, 83 Torbreck (Gwen Richards) (19/06)

Lesser Redpoll

Single male bird on garden feeder, 81 Torbreck (Cheryl Smith). It has been an exceptional year for reports of Lesser Redpoll. (19/06)

Twite

Four birds, Bay of Culkein (Janet French). Photo Gallery - Birds (19/06)

Golden-ringed Dragonfly (Cordulegaster boltonii)

Pair of dragonflies coupled in pre-mating flight, Culkein Drumbeg (DAH) (18/06)

Brimstone moth (Opisthograptis luteolata)

Single moth flying in trees, Culkein Drumbeg (DAH) (18/06)

Pied Wagtail

Adult bird feeding two juveniles, Culkein Drumbeg jetty area (Steve and Carol Langford) (17/06)

Map