Alders are trees that compose the genus Alnus in the birch family Betulaceae. The genus includes about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes.
Alnus glutinosa, the common alder, black alder, European alder, European black alder, or just alder, is a species of tree in the family Betulaceae, native to most of Europe, southwest Asia and northern Africa. It thrives in wet locations where its association with the bacterium Frankia alni enables it to grow in poor quality soils. It is a medium-sized, short-lived tree growing to a height of up to 30 metres (98 feet). It has short-stalked rounded leaves and separate male and female flowers in the form of catkins. The small, rounded fruits are cone-like and the seeds are dispersed by wind and water.
Alnus incana, the grey alder, tag alder or speckled alder, is a species of multi-stemmed, shrubby tree in the birch family, with a wide range across the cooler parts of the Northern Hemisphere. Tolerant of wetter soils, it can slowly spread with runners and is a common sight in swamps and wetlands.
The grey dagger is a moth of the family Noctuidae.
Arocatus roeselii is a species of lygaeid bug.
Bucculatrix cidarella is a moth of the family Bucculatricidae. It is found in most of Europe, Kazakhstan and Japan (Honshu). It was described in 1839 by Philipp Christoph Zeller.
Stigmella glutinosae is a moth of the family Nepticulidae. It is found in all of Europe.
Phyllonorycter froelichiella is a moth of the family Gracillariidae. It is found in all of Europe, except Greece.
Phyllonorycter chrysella is a moth of the family Gracillariidae. It is known from southern France, Spain and Italy.
Phyllonorycter stettinensis is a moth of the family Gracillariidae. It is found from Scandinavia and Finland to the Pyrenees, Corsica, Italy and Bulgaria and from Great Britain to Russia.
Phyllonorycter klemannella is a moth of the family Gracillariidae. It is known from all of Europe, except Greece.
Phyllonorycter rajella is a moth of the family Gracillariidae. It is known from all of Europe, except the Iberian Peninsula and Greece.
Caloptilia elongella is a moth of the family Gracillariidae. It is known from all of Europe east to eastern Russia. It is also found in North America from British Columbia, south to California and east in the north to New Hampshire and New York.
Caloptilia alnivorella, the alder leafminer, is a moth of the family Gracillariidae. The species was first described by Vactor Tousey Chambers in 1875. It is known from the Russian Far East, Canada and the United States.
Hydrelia flammeolaria, the small yellow wave, is a moth of the family Geometridae. The species was first described by Johann Siegfried Hufnagel in 1767 It is found in most of the Palearctic realm, from western Europe to Japan.
Coleophora binderella is a moth of the family Coleophoridae. It is found from Scandinavia and Finland to the Iberian Peninsula and Italy, and from Ireland to the Baltic States and Romania.
Coleophora milvipennis is a moth of the family Coleophoridae. It is found in all of Europe, east to Japan (Hokkaido).
Galerucella lineola is a species of leaf beetle in the family Chrysomelidae.
Hemichroa crocea, the striped alder sawfly or banded alder sawfly, is a species of sawfly in the family Tenthredinidae. It is probably native in Europe and has been introduced to North America. The larvae feed on the foliage of several species of alder and sometimes on birch, hazel and willow.
Eriocampa ovata, known generally as the alder sawfly or woolly alder sawfly, is a species of common sawfly in the family Tenthredinidae. The larvae feed on the leaves of the common alder and the grey alder, sometimes causing defoliation.
