▁in ▁early ▁ 2 0 1 5 . ▁Chris ▁Pack ham , ▁Natural ist , ▁Wild life ▁Phot ograph er ▁and ▁TV ▁Pres enter ▁of ▁program mes ▁such ▁as ▁Spring watch ▁and ▁Aut umn watch , ▁has ▁written ▁of ▁this ▁book ; ▁" The ▁season ▁has ▁changed ▁but ▁the ▁silence ▁is ▁deeper ▁and ▁that ' s ▁why ▁this ▁important ▁book ▁must ▁be ▁read . ▁It ' s ▁not ▁a ▁catalog ue ▁of ▁do om ▁– ▁it ' s ▁a ▁p rag m atic ▁snapshot ▁of ▁reality ▁and ▁a ▁des perate ▁ple a ▁for ▁action . ▁ ▁Your ▁action ". ▁ ▁In ▁January ▁ 2 0 1 5 , ▁as ▁part ▁of ▁a ▁collabor ative ▁effort , ▁the ▁multi - author ▁book ▁titled ; ▁Austral ▁Ark : ▁the ▁state ▁of ▁wild life ▁in ▁Australia ▁and ▁New ▁Zealand , ▁edited ▁by ▁Adam ▁St ow , ▁Norman ▁Mac lean , ▁and ▁Gregory ▁Hol well ▁was ▁released . ▁ ▁Mac lean ▁is ▁now ▁working ▁on ▁a ▁new ▁multi - author ▁book ▁to ▁be ▁published ▁by ▁Cambridge ▁University ▁Press , ▁entitled ▁" The ▁State ▁of ▁the ▁World ' s ▁Wild life ". ▁It ▁is ▁likely ▁to ▁be ▁published ▁in ▁ 2 0 2 0 . ▁ ▁Selected ▁journal ▁articles ▁Dar u , ▁B . D ., ▁Mann ing , ▁J . C ., ▁Bo at w right , ▁J . S ., ▁Maur in , ▁O ., ▁Mac lean , ▁N ., ▁Sch ae fer , ▁H , ▁K uz mina , ▁M . ▁& ▁Van ▁der ▁Bank