Bird cherry - Prunus padus

''Prunus padus'', known as bird cherry, hackberry, hagberry, or Mayday tree, is a flowering plant in the rose family Rosaceae. It is a species of cherry, a deciduous small tree or large shrub up to 16 m tall. It is the type species of the subgenus ''Padus'', which have flowers in racemes. It is native to northern Europe and northern Asia.