IN NUM­BERS

BBC Wildlife Magazine - - Wild News -

60kg

is the amount of waste, in­clud­ing plas­tic, that can be col­lected by WasteShark (an au­tonomous ma­rine ro­bot) in one trip.

50%

more off­spring are pro­duced by young red squir­rels that in­herit food caches aban­doned by older male squir­rels, ac­cord­ing to a study in Canada.

20,000km

is the an­nual mi­gra­tion dis­tance made by the 12g black­poll war­bler – one of the long­est song­bird mi­gra­tions recorded.

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