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pollen dust from birch tree on blurred background
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Spring birch buds isolated on white. Flowering birch branch.
Birch catkins with green leaves on tree branches on a sunny spring day in Denmark. More and more people are getting allergic to birch pollen.
Poplar down on poplar during flowering in spring.
Catkins on a Paper Birch tree in Springtime.
Blooming birch tree branches on blue sky background
Birch pollen is very common and is a major cause of allergic rhinitis and, possibly, asthma. The pollen can be carried great distances. Birch pollen allergy is thought to affect approx. 25% of hay fever sufferers.
pollen of birch tree blossom in the air during spring
Sunset shining trough hazel seed and forming sunbeams
Birch pollen shedding
Hazel (Corylus avellana) männliche Catkins
Allergy - haselnut blossom - Hay Fever
The peeling bark of a paper birch tree.
Spring background - a flowering spike of birch trees on a branch. Catkins are downy, pendulous, composed of flowers of a single sex, and wind-pollinated.
Blooming young bud on a tree branch with blurry background macro shot spring
View of spring park - birch trees with leaves buds and catkins on branches, sunshine and blue sky.
Spring blooms
a earrings of a flowering birch in spring in the city on a sunny day
Birch catkins with green leaves on tree branches on a sunny spring day in Denmark. More and more people are getting allergic to birch pollen.
Close-up photo of birch tree buds with yellow pollen over blue sky background
Birch tree in bloom in spring.
A birch tree with yellow leaves and catkins and a blue sky in the background
Close-up of Paper Birch trees with blurred motion photographic effects in Springtime.
Birch tree earrings in spring sunny day, shallow focus
Spring blooms
Spring blossoms tree birch with young green leaves. Spring blossoms tree birch with young green leaves
birch tree
Spring and pollen allergic from birch tree
blooming tree
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