European green woodpecker though the latter is smaller and more slender with narrower wings and longer tail. The closely related, very similar Levaillant's woodpecker occurs only in north-west Africa. The European green woodpecker is a member of the order Piciformes, the woodpecker family Picidae and the genus Picus. It was first described by Linnaeus in 1758. The scientific name is derived from the Greek "pikos", meaning 'woodpecker', and Latin "viridis", 'green'. There are four subspecies, with subtle and mostly clinal differences between them. In a recent study based on mitochondrial DNA analysis of subspecies by Perktaş, Barrowclough and Groth, it has been proposed
English markers of habitual aspect English markers of habitual aspect The habitual aspect is a form of expression connoting repetition or continuous existence of a state of affairs. In English when present time is referred to, there is no special grammatical marker for the habitual; the simple present is used, as in "I go there (every day)." However, for past reference English uses the simple past form or either of two alternative markers: "used to" as in "we used to go there (every Thursday)", and "would" as in "back then we would go there (every Thursday)". The form [would + infinitive] is employed to talk