Florian Möllers / Red squirrel (Sciurus vulgaris) reaching up to take walnut from hand, Berlin, Germany, November. Model released

Suzi Eszterhas / Western Gray Squirrel (Sciurus griseus) three month old orphaned young drinking milk, WildCare, San Rafael, California

Suzi Eszterhas / Western Gray Squirrel (Sciurus griseus) five week old orphaned young drinking mild, WildCare, San Rafael, California

Suzi Eszterhas / Eastern Fox Squirrel (Sciurus niger) four week old orphaned young drinking milk, WildCare, San Rafael, California

Suzi Eszterhas / Eastern Fox Squirrel (Sciurus niger) three week old orphaned young drinking milk, WildCare, San Rafael, California

Robin Chittenden / Persian squirrel (Sciurus anomalus) on windowsill, Lesbos, Lesvos, Greece, April.

Robin Chittenden / Persian squirrel (Sciurus anomalus) on ledge, Lesbos, Lesvos, Greece, April.

ZSSD / California Ground Squirrel (Spermophilus beecheyi) being released as part of relocation project to build nest burrows for burrowing owls, California

Bertie Gregory / 2020VISION / Woman feeding a Grey squirrel (Sciurus carolinensis) in Regent's Park, London, England, UK, April 2011 Model Release Available

Mark Moffett / President Obama's personal chef Sam Kass in Michelle Obama's vegetable garden, White House, Washington D.C.

Florian Möllers / Elderly lady feeding walnut to Red squirrel (Sciurus vulgaris) by hand, cemetery "In den Kisseln", Berlin, Germany.

Florian Möllers / Elderly lady feeding walnut to Red squirrel (Sciurus vulgaris) by hand, cemetery "In den Kisseln", Berlin, Germany, November