Esquilo-de-douglas
Tamiasciurus douglasii
Mamífero
Pequeno e barulhento esquilo arborícola da costa do Pacífico que corta pinhas verdes de coníferas e as armazena em depósitos úmidos na base das árvores, onde as pinhas permanecem fechadas e a semente se conserva. As pilhas de escamas roídas são um dos sinais mais evidentes de sua presença em uma mata de coníferas.
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Cuts green cones and stockpiles them in damp ground middens, where the closed cones keep the seed; the stripped-scale piles are an obvious field sign.
The resident tree squirrel of the coastal grand fir forest, and its behaviour is shaped by the way fir cones fall apart. It cuts the cones GREEN and drops them, then stockpiles them in damp middens where they stay closed and the seed keeps; waiting for ripeness would mean waiting until the cone had already shed itself. The heaps of stripped scales at the base of a big fir are its work.
Douglas squirrels cut green cones and pile them in middens, and lodgepole is a staple across its Pacific and interior range. Those middens are a substantial seed store and a food source for other species in turn.
The same role on the Pacific side of the range, in the Cascades and coastal mountains where the Douglas squirrel replaces the red squirrel. The silvical and encyclopedic accounts of subalpine fir name pine squirrels among the principal seed consumers; which of the two species is doing it is simply a matter of which side of the divide the stand is on.
Cuts green cones and stockpiles them in damp ground middens, where the closed cones keep the seed; the stripped-scale piles are an obvious field sign.
Distribuição
Florestas de coníferas costeiras e montanhosas do Pacífico, do sudoeste da Colúmbia Britânica passando por Washington e Oregon até a Sierra Nevada, na Califórnia.
Fontes e citações
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Use esta citação para o registro de fauna do Plotwright. Use os cartões de fontes abaixo para explorar as referências que informaram sua taxonomia, distribuição, conservação, plantas hospedeiras, forrageamento e habitat.
Plotwright. (n.d.). Esquilo-de-douglas (Tamiasciurus douglasii). Retrieved 2026, September 9, from https://plotwright.com/wildlife/douglas-squirrel
Fontes usadas neste registro
Este registro foi compilado a partir das fontes abaixo.
Animal Diversity Web: Tamiasciurus douglasii
Species account for conifer-cone harvesting, midden caching, habitat, and Pacific-coast distribution.
GBIF: Tamiasciurus douglasii
GBIF backbone key 2437281 is an exact accepted match for Tamiasciurus douglasii in family Sciuridae.
iNaturalist: Tamiasciurus douglasii
iNaturalist taxon 46259 is the active species record with community observation range data.
Wikipedia: Douglas squirrel
Corroborating reference for midden behaviour and the conifer species it depends on.