I was surprised a couple of days ago on 16th November to see a chiffchaff (gransanger) flitting about feeding in an apple tree in the garden. I saw it again today and made a short video and a few pictures (below). There’ve been several observations in the neighbouring municipalities recently as part of a trend as our autumn gets longer. However, this seems to be the first ever observation in my municipality (Malvik) in winter (November-February).
During a powerful wind storm earlier in the year one of my oldest sallow / selje trees on the edge of the wild part of the garden was wind thrown and fell over the part of my garden most resembling a forest garden where my impressive 20-year old udo (Aralia cordata) is located. Luckily, it did no damage to my apple trees and the trunk is hanging horizontally over this area with part of the root still attached and what was the top of the tree now in full flower right next to the pathway down the garden. Salix caprea is dioecious with male and female flowers on separate trees. This one is female. I have over the years become more and more aware of the incredible importance of Salix caprea in providing food in early spring to a myriad of insects – wild bees, bumble bees, moths etc., all programmed to emerge at this time. In addition, it is host in Norway to 260 moth and butterfly species at the larval stage! This then leads to this tree being an important source of food to a range of birds and some like the chiffchaff (gransanger) are also programmed to return at sallow flowering time. During visits to my mum in Southern England in March / early April I visit other fallen sallows to look for interesting insects and I’ve noticed that they can continue flowering for several years after falling and resprout from the part of the root in the soil. So, although I was initially saddened bye the loss, this is just one of several large sallow trees in this part of the garden and now I have the top of a sallow at eye level right next to a path in the garden and can now study visiting insects closely. Just now, I saw an early bumblebee / markhumle (Bombus pratorum) feeding on the catkins. It’s also a perfect place to hang my moth trap (picture)!
Hence “A blessing in disguise” (Norwegian: hell i uhell).
See also https://www.edimentals.com/blog/?p=32035
My interest in recording the incredible diversity of insects in my 40 year old edible forest garden lead to a much better understanding of the importance of different key species for the biological diversity present in the garden and the goat willow (selje) is perhaps the most important species of all despite the fact it is only a very marginal edible plant for us. I was aware of the importance of the nectar provided by willow to bumble bees and wild bees in the spring, but I was totally unaware earlier of the importance of this tree for moths emerging as adults in mid-April. I have so far recorded over 30 species of moth which are dependent on willow either in spring or in the larval stage (see the amazing diversity of the moths photographed in the garden in the picture at the bottom. However, this also explains the arrival of the chiffchaff (gransanger) and other migratory species in a wave in the middle of April here…arriving to a ready supply of insect food. The videos show our chiffchaff insect catching up amongst the catkins of one of the goat willows in the garden on 21st April, often singing as he hunts. Another fascination I’ve had for many years is the incredible complexity and beauty of bird song when slowed down (like a sound microscope; after hearing a BBC radio program about this and particularly the song of the wren: https://www.youtube.com/watch?v=S9x2rjExeW8). The second video is of the chiffchaff at normal and 10% speed as it hunts amongst willow catkins. The third video is also slowed down and shows a singing flycatching chiffchaff and a bumble bee flies past at the end (see at full screen)!
As the most important tree for insect diversity in the spring – goat willow / selje (Salix caprea) – emerges into flower, two more moths that feed on the catkins turned up in the garden this morning, yellow horned (vårhalvspinner) and clouded drab (variabelt seljefly). Just waiting now for the influx of birds (chiffchaff, dunnock, thrushes) that feed on this insect feast!
There are records of arctic peoples chewing the flowers of various Salix species for the sweet taste and, from Alaska “Indigenous children strip the catkins of this shrub and chew them. They are commonly referred to as “Indigenous bubble-gum” and are eaten before seeds ripen in June and July”.
The catkins of Salix caprea taste good to me, but I don’t know of any use of this species historically.
Chiffchaffs (gransanger) have been flycatching around the Buddleja bush and on the veranda over the last weeks and I guess it was only a matter of time before one explored the rich pickings on the windows of the living room, also known as my indoors forest garden. This is the inviting view from the balcony looking into the living room with the door open:
Sat at my desk in the living room on the 18th September and suddenly a chiffchaff had joined me and was catching insects inside:
