September Highlights

It is starting to feel very autumnal now we are into September. The sun seems to be only glimpsed on occasion, the wind is back and there is a chill in the air. It will soon be time to click the heating on and get the fire lit.

Much of the birdlife has already started to move on. The seabirds were the first to leave, the cliffs at Sumburgh head are all bare now that the Puffins, Guillemots and Razorbills have left to spend the winter at sea although you may still find Fulmars and Gannets with large young still in the nest. The insect life in the garden will be getting less too as species such as the bumblebees, moths and butterflies migrate or look for a cosy place to hibernate over the winter.


In Focus- Autumn Migration

September is the peak month for the autumn bird migration in Shetland where the birds, having finished breeding, are heading back to their wintering grounds crossing through Shetland en route. During favourable weather conditions (easterly winds) large numbers of migrants and even some vagrants (birds who have been blown off course) can appear in Shetland. Some more memorable visitors have included: Siberian Rubythroat, Chestnut-eared Bunting and Siberian Accentor. Remember to provide a shallow dish of water, as many of these birds have flown a long away and will be thirsty as well as hungry.

Siberian Accentor
Copyright: Rob Fray

Some of the more difficult migrants to identify are the Warblers as many species can be very similar in appearance. Warblers are mostly insect eaters and may be seen flitting between bushes and shrubs in the garden catching small bugs. I will introduce you to a handful of the more common species but if you are unsure of an ID and have managed to get a photograph you can email it to us at shetlandcommunitywildlife@outlook.com or if you are on Facebook, post it on the Nature in Shetland Photos group where there are a lot of local enthusiasts who can help.


Willow Warbler (Phylloscopus trochilus)

The Willow Warbler is a small warbler (10.5-11.5cm) with a pale underbelly and a green/grey upper body and wings. As many of the individuals passing through in Autumn are juveniles, they tend to be brighter yellow in colour. They have a light-yellow stripe above the eye. They are very similar in appearance to the Chiffchaff but have pale pink legs. Willow Warblers are earlier migrants than the Chiffchaff, commonly seen in early September.

Willow Warbler
Copyright: Rob Fray

Chiffchaff (Phylloscopus collybita)

Chiffchaffs are a similar size (10-11cm) to Willow Warblers but have a more olive-brown colouration, a paler eye stripe and dark grey-black legs. They flit quickly between branches and when stationary express a distinctive tail-wagging behaviour which Willow Warblers do not. Chiffchaffs arrive towards the end of September through until early November.

Chiffchaff
Ken Billington / CC BY-SA

Yellow-browed Warbler (Phylloscopus inornatus)

The Yellow-browed Warbler is another small warbler, slightly smaller in size to the Willow Warbler and Chiffchaff. They are a little easier to identify than the previous two: they are greenish brown in colour with a pale underbelly, they have a thick, distinctive eye stripe which gives them their ‘yellow-browed’ name and two light coloured wing bars. Formerly, the Yellow-browed Warbler was a very scarce migrant but in recent years they have appeared in much greater numbers to the extent that in late September they are now often the most common migrant warbler in Shetland.

Yellow-browed Warbler
Copyright Rob Fray

Other warblers passing through this month include: Lesser Whitethroat, Garden Warbler and Barred Warbler.


Moth of the Month- Square-spot Rustic

The number of moths flying and coming to the moth trap will be starting to slow down this month as the colder, windier weather of the Autumn starts to come in. One of the later flying moths that is common into September is the Square-spot Rustic (Xestia xanthographa). They get their name from the rather conspicuous square kidney shaped mark on the forewings. Colour can vary from shades of red, grey and brown. I often see the reddish/chestnut colouration which I think is especially pretty.

They are sugar eaters and can be seen feeding on plants such as Ragwort, Heather and Marram. Some years they are seen in large numbers, best seen at dusk over grassland areas.


In other news…

There are a handful of different dolphin species that can be spotted around the Shetland coast. Risso’s Dolphins are resident in the isles and are the most commonly seen. Atlantic White-sided Dolphins are rare vagrants but when they do arrive, they are often in what is known as a ‘super pod’ of 50-100 individuals. White-beaked Dolphins are resident, but sightings are reasonably rare.

Risso’s Dolphin (Grampus griseus) are a large species of dolphin growing up to 4m in length. They are what is known as a beakless dolphin as they have a bulbous square-shaped head. They are dark in colour but become whiter with age, mature animals are often covered in many scars and scratches. These scars come about from fights with other Risso’s and from their favourite prey- squid. Individuals animals can be identified by their unique pattern of scars. They can appear in groups of 50+ individuals although in Shetland, groups of over 20 are rarely seen.

Risso’s Dolphin with calf
Copyright: Rob Fray


August Highlights

The sun is still shining (some of the time) and summer is still in the air but the wildlife will be starting to slow down a little. Our garden birds have successfully reared possibly up to three broods of young who have fledged the nest. Some species, such as Curlews, Starlings, Golden Plovers and Oyster Catchers are starting to flock together in quite large numbers now that breeding has finished. Take a look in the cut fields (favoured feeding area for many wading birds) in your area and you may spot Ruff and Black-tailed Godwit in amongst the flocks of Curlews. Our seabirds are also starting to head back out to sea for the winter so these first couple of weeks in August may be your last chance to head up to Sumburgh Head to catch a sight of the puffins.

In Focus-Rockpools

Shetland has a variety of seashore habitats from the long pale sandy beaches of the South Mainland to the red sands of Eshaness in the North. An abundance of low rocky shore in between gives plenty of opportunities for a spot of rockpooling. One of the best spots is Leebitten at the North end of Sandwick which has a large expanse of seaweed cover rocks and pools at low tide.

Within these areas you will find an array of different species perfectly adapted for living in this harsh, ever changing environment. To find out more about the species to spot, take a look at our Inside a Shetland Rockpool post. And don’t forget to keep a look out for any alien invaders and non-native species, check out our Marine NNS post for more details.

Copyright Rachel Shucksmith
Copyright Kathryn Allan

It is a perfect summer activity to do with children giving them an opportunity to explore nature hands on, just remember to put anything you find back once you have finished looking at it and replace and upturned rock and weed.

If you plan on taking a trip to the coast, check the tide times first and be mindful of the rising tide. Do not go alone and always carry a mobile phone, f you find yourself in trouble call 999 and ask for the coastguard.

Moth of the Month- Large Yellow Underwing

The Large Yellow Underwing (Noctua pronuba) is a large moth with a wingspan of around 45-55mm. This distinctive moth gets its name from the yellow/orange coloured underwings only visible during flight when the forewings are open. It is a common resident moth in Shetland, active from July to September but often has a peak in numbers in August. Can be found in a range of habitats from moorland to grassland and gardens where, during the day they take cover amongst ground vegetation where they can be seen flying for cover if disturbed.

Copyright: Jacy Lucier / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0)

In other news…

Minke whales (Balaenoptera acutorostrata) are a relatively common sight around Shetland waters in August where they can be seen feeding just off the coast. They are the smallest of the baleen whales growing to around 8-9 metres long and living up to 50 years.

They are black to dark grey with a white underbelly and have distinctive white bands around their pectoral fins (flippers). They have a long, pointed snout and two blow holes on top of their heads.

NOAA / Public domain

Baleen whales- Filter feeding whales with large baleen plates in their mouths instead of teeth. Baleen is made from keratin, the same substance in hair and nails so is stiff yet elastic and is layered in plates in two rows along the top jaw of baleen whales somewhat like combs of thick hair. When feeding, water is taken into the mouth and pushed out through the baleen plates to filter out food such as krill and plankton which is then swallowed.

Copyright Karen Hall

The most common UK sightings of Minke whales are in Scotland and Shetland has its fair share. They are often spotted from cliffs and headlands where they can be seen fishing in strong currents. They fish by taking in large quantities of seawater known as ‘lunge feeding’. Long pleats in their throat allow it to expand and take in large mouthfuls. The water is then forced back out through the baleen plates and the prey swallowed. They have a varied diet feeding on a range of small fish, krill and zooplankton.

“The minke whale, like all cetaceans, is protected as a European Protected Species (EPS). EPS legislation protects all species of cetacean from deliberate and reckless killing, injury and disturbance. Information on how to minimise the risk of activities which may kill, injure or disturb minke whales is set out in Marine Scotland’s guidance on The protection of marine European Protected Species from injury and disturbance.

The minke whale is also a Priority Marine Feature in Scotland’s seas and has recently been included within two of four additional Nature Conservation MPA proposals for designation to complete the Scottish MPA network.

The Scottish Marine Wildlife Watching Code provides the best guidance for wildlife watching operators, and will help us all enjoy and support the conservation of this wonderful baleen whale.”

(https://www.nature.scot/plants-animals-and-fungi/mammals/marine-mammals/minke-whale)


Summer Holiday Project #5- Create your own Mini Ecosystem

This is a great fun activity and really easy to do. We used different species of moss in ours but you could use any small plants such as sedums and alpines that don’t grow too big. Once made just pop it on a sunny windowsill and watch it change and grow. It is also a great way to learn and watch the water cycle in action keeping your mini ecosystem alive and thriving.

Download the Mini Ecosystem leaflet to find out how to get started.


Summer Holiday Project #4- Build your own Hibernaculum

What’s a hibernaculum I hear you ask…..it is a warm, dry, safe place for reptiles and amphibians to hibernate over the winter. The word ‘hibernaculum’ means “winter quarter”, with the Latin word hibernus meaning “winter”.

Here in Shetland the Common Frog is our only amphibian, but they are plentiful. They hibernate over the winter in underground holes to avoid the cold and frost, their heart and breathing rate slow right down and they no longer need to find food.

By creating a hibernaculum in your garden, you are providing the perfect place for frogs to hibernate whilst making space for nature and encouraging more wildlife into your garden.

Download the Hibernaculum leaflet to find out how to get started.


Have you spotted a Crofter’s Wig?

Crofter’s Wig (Ascophyllum nodosum ecad makii) is a very rare and interesting little seaweed. It is a form of egg wrack (Ascophyllum nodosum)but is free-living (not attached to anything). It is thought to have first originated from broken fragments of the normal form of egg wrack but in very sheltered conditions grows unattached. It gets it’s name, Crofter’s Wig, from the wig-shaped masses it forms. It prefers the mid-upper tidal zone in very sheltered areas such as the head of some voes where it is not at risk of being washed away by stormy weather.

Austin Taylor/ Copyright Shetland Islands Council

To submit any potential sightings of this species, send your name, location (with a grid reference if possible) and a photograph if you have one, to us via email to shetlandcommunitywildlife@outlook.com or fill in the contact form here.

Austin Taylor/ Copyright Shetland Islands Council

It is a Priority Marine Feature (PMF) and a UK Biodiversity Action Plan species (UKBAP). It provides an important habitat for other seashore species such as crabs and molluscs.

So far in Shetland it has only been recorded on the west side of Shetland and is considered globally rare. The Shetland records might represent the northern most extent of this species.

Austin Taylor/ Copyright Shetland Islands Council

Summer Holiday Project #3- Make your own BIOGAS

This week is all about science. We want you to head back to the shore to collect more seaweed so that you can make your own renewable energy source- BIOGAS.

BIOGAS is made up of methane and carbon dioxide which can be used as a renewable source of fuel or turned into electricity and heat. Seaweed is a great material for making BIOGAS as seaweed farming is environmentally sustainable, but you can also give it a try with grass cuttings or food waste. You can also try changing the conditions in which you make your BIOGAS, try putting it in a sunny spot or dark cupboard, a warm or cold place- what happens?

Download our BIOGAS leaflet to get started.


Delve into the World of Hoverflies….

…with this new ID guide by Rebecca Nason

A local naturalist and wildlife photographer, Rebecca has a passion for hoverflies and has recently created a leaflet to help people identify and record these garden visitors…..

We are only just beginning to scratch the surface of species, populations and distribution of hoverflies on Shetland, with only a few naturalists delving into their identification and recording them. With understanding of Shetland hoverflies still in its infancy, there is still much to learn and add to the current database of knowledge. These are exciting times for the Shetland naturalist; with so much to still explore and understand, anyone can really make a difference to biological recording in the Islands.”

Download Shetland’s Hoverflies- A Photographic Identification Guide here.

Common Snout. Copyright Rebecca Nason
Plain-faced Dronefly. Copyright Rebecca Nason

We welcome your Shetland hoverfly records or photographs for identification. Please use the Shetland Insect Group on Facebook Page, or contact Paul Harvey at Shetland Biological Records Centre (paul.harvey@shetlandamenity.org). Please don’t forget to add a location (grid reference if possible) and a date to your discoveries.


Summer Holiday Project #2- Make a Wave with Marine Litter

This week will take you back to the beach to do a beach clean, great for helping nature by removing plastic from our seas and coastlines BUT dont throw it away, you’re going to need it for this weeks art project.

We will be using the marine litter to create a piece of wave art. You can get as creative as you like experimenting with different shapes, colours and textures. It is amazing the varity of man-made items that end up on our beaches!

Download our Make a Wave with Marine Litter leaflet to get started.


Why Record?

Paul Harvey- Shetland Biological Records Centre

Kathryn Allan- UHI Shetland

This is a question that we often get asked – why are you bothering to record that? What’s the point? Put simply recording the wildlife around us helps build up our knowledge of the environment – what is where and how might this be changing. Shetland’s socio-economic well-being is tied heavily to its environment – fishing, aquaculture, agriculture and tourism are all dependent on a clean, thriving environment. Recording helps us to monitor the health of this environment and can act as an early warning system if, and when, things start to go wrong. It can often be done relatively cheaply using so called citizen science – as hundreds of folk enjoy getting outside and many of these contribute by sending in their wildlife observations or posting them on social media.

We’ll try and outline a few examples of why recording can be important. Some species are common and widespread and some species are rare and localised. The only way we can ascertain which is which is through recording. The Bog Orchid is a tiny but attractive wee orchid that, as its name suggests, grows in damp, acid bogs. It is a rare plant in Shetland and indeed throughout Scotland and was known from only a handful of sites in the islands. A small group of folk out looking at and recording flowers came across a previously unknown site for the species in the Catfirth area. And what a colony it was, numbering several hundred plants and making it the biggest colony in Scotland. It so happened that this area was earmarked for a housing development but following discussion with the Council the developer changed the plans slightly meaning the site could be saved and Scotland’s largest Bog Orchid colony remains for others to enjoy. Without recording, this site would have been lost.

Bog Orchid (Copyright Jim Nicholson)

The Curlew is a relatively common bird in Shetland. Yet elsewhere in the UK the Curlew population has plummeted such that it is now on the Red List of Birds to watch. Every year since 2002 about 60 Shetland residents head out twice in the spring with maps to record breeding birds in a one kilometre square close to their home. These data are collated and have allowed us to establish population trends for our more common breeding birds. This has told us that the Curlew population in Shetland is holding its own; unlike elsewhere in the UK it is not in sharp decline. This also suggests that existing crofting/farming practices in Shetland are currently well suited to maintaining Curlew (and indeed other breeding wader populations). Many of these waders – Curlew, Lapwing, Redshank, Snipe, Oystercatcher are present here in nationally important numbers. Now more than ever the taxpayer is looking for greater public benefits from agriculture and it is likely that rewards for farming in an environmentally sensitive manner will increase in the future. So here, volunteer recorders have provided the data that allows environmentalists and farmers to make strong arguments that the existing agriculture in the islands should be supported because it already yields considerable environmental benefits.

Curlew (Copyright Jim Nicholson)

Global warming is on almost everyone’s lips these days. Can we show it is happening here in Shetland? There has been much talk of the adverse impacts of a rise in sea temperature on Shetland’s seabirds and this is likely to impact on fish stocks too but things are very complicated in the marine environment and it’s not always easy to make direct links. A few island residents however have been recording large insects – bumblebees, butterflies, moths and hoverflies for starters – and this has revealed some big changes as a result of climate change. Insects have good powers of dispersal and can reproduce very quickly and in large numbers so are often one of the first groups to respond to environmental change. In the last few years, the recording undertaken by these folk has revealed that two species of bumblebee and several species of moth have, or are in the process of, colonising the islands.

In our marine environment, previously unseen non-native species (NNS) coming from elsewhere in the world can become established in the isles due to the change is sea temperatures. UHI Shetland has been monitoring ports and marinas for a few years as this is usually where species first enter on the hulls of boats or ballast water. Once established they can be very difficult, if not impossible to eradicate. These non-native species are troublesome as they can compete with our native species for food and space and smother aquaculture structures causing economic impact. To be able to assess if these species have made it into the ‘wild’ (beyond man made structures) we need everyone’s help to submit records of species they find whilst out on our beaches and coastlines.

The many individuals that record wildlife here in Shetland are also helping to put the islands on the map. Thanks to these efforts Shetland is now well represented in new publications about Scotland’s or the UK’s wildlife. This helps establish patterns and trends farther afield than just our islands, and can also illustrate just how important the Shetland’s biodiversity is.

Finally, it is important to say that watching and recording wildlife should also be about fun. If this can be done as a group then the accompanying banter can certainly add to the atmosphere(!) and learning can become so much easier. It seems that nationwide, the recent pandemic has encouraged a lot of people to get out and reconnect with nature and that can only be of benefit to us as individuals by boosting our mental wellbeing and to society as we struggle to overcome the many environmental challenges that we will face in the future.

Local recorders have ensured that Shetland is properly represented in national atlas’ in recent years helping to complete the national picture.

So, we’d be delighted to receive any records of wildlife and plants that you can make. All we need is an observer name, date, location (preferably a grid reference) and your record will be added to the Shetland database

For a list of current projects that you can get involved in visit our Projects page.