Even in this strange time where we have to stay home, some of us are lucky enough to watch a fantastic migratory bird in their backyard, the Redwing -thread 👇 & more details in @AvesBE blog in FR (📷C Farinelle) #ornithology blog.aves.be/aves/2020/4/5/… Image
Redwing breeding range extends from NW Europe E to the Kolyma river bassin: 60% of the world population breed in Asia but almost all the population is wintering in WP, so Kolyma birds have to fly at least 6500km to reach nearest Caspian wintering grounds
datazone.birdlife.org/species/factsh… Image
Redwings, like other tree fruit foragers, are rather nomadic in winter. And they can shift completely their destination from one winter to the next. Some birds ringed in winter in Belgium were recovered as far as the Caucasus in a subsequent winter source: odnature.naturalsciences.be/bebirds/fr/rin… Image
Contrary to many migrants, Redwing are frequently seen foraging inside dense woodland, especially during their spring migration. About 30% of foraging Redwing in S Belgium in March are seen in deciduous forest /data from @observado mixed with "Ecotope" from @LifeWatch_WB Image
One of the attractive feature of our woodlands in this time of year is probably the Common Ivy, rich in berries even in early spring. It is always wonderful to find a group of these elegant passerines hiding in evergreen vines.
📷Tony Sutton cc-by-nd Image
These redwing groups are quite noisy, performing a form of strange chorus song, bringing us some flavours of boreal forest in our temperate part of Europe. There are several examples of these chorus in @xenocanto , check this one from Germany: xeno-canto.org/485862
Maybe there is still a chance for you to see some Redwing even from your balcony as they are heading North, check the situation live on #EuroBirdportal - anyway stay safe! eurobirdportal.org/ebp/en/#home/T… Image
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More from @JYPaquet

26 Oct
European Stonechat is a gorgeous bird & an exception among decreasing #FarmlandBirds in Belgium: population increased 4-fold since 2000. Why is #stonechat so successful in man-made landscape?
Paper from RGailly out in #Oecologia @SpringerNature thread #ornithology 📸FCarion 1/10 ImageImage
In our study area, stonechats can choose b/w 3 habitats: clear-cut, grassland & Christmas-tree plantations (CTP) a non-food perennial crop. A previous study shown this crop is offering a higher bird diversity than grassland when hedgerows are scarce. 2/10 sciencedirect.com/science/articl… ImageImage
But is this a good idea for stonechat to breed in intensive Christmas-tree crop? We compared fitness-related parameters between these 3 anthropogenic habitats. First, ♂️♂️ prefer clear-cut over the 2 other habitats as they are reoccupied earlier after spring migration 3/10 Image
Read 11 tweets
10 Jun
Today was my last Common Bird Monitoring round for this spring in Eau Blanche river valley -Belgium. A valley covered with meadows, farms here producing beef/milk. I'm monitoring there since 1990! This led me to some reflections about #biodiversity & #meat 👇
#ornithology 1/9 Image
If all farmland in BE were like this valley, we would not contemplate this kind of depressing #FarmlandBirdIndex graph. It shows the average trend of 15 species of bird specialized in farmland in Wallonia (source: @AvesBE & #DEMNA) 2/9 Image
In Eau Blanche valley, Tree Sparrow, Meadow Pipit, Turtle Dove are also declining, but at least some of them are still present. Stonechat, scarce in 1990, are now abundant. Today, I saw Black & Red Kites, Black & White Storks all 4 in the same field ! Unthinkable 30 yrs ago. 3/9
Read 10 tweets
10 Mar
Last week I visited Collserola NP, Barcelona, with my friend Joan Estrada. He showed me a remarkable #invasivespecies, the Red-billed Leiothrix. But then I started looking into the papers about its possible harmfulness... ⏬ #ornithology

Right pic by ucumari photography CC. ImageImage
Member of Leiotrichidae (which includes Babblers and Laughingthrushes), RB Leiothrix is indigenous in Asia, introduced in Japan (despite its popular name in some languages "Rossignol du Japon"), in Hawaii and recently in several distinct areas in Europe
datazone.birdlife.org/species/factsh… Image
Unlike most invasive bird species, which thrive in highly anthropized landscape, RB Leiothrix selects natural habitat in its non native range - like here in Collserola broadleaf forest with dense undergrowth. Beside its nice colors, this is also why watching this bird is special Image
Read 12 tweets

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