The buds, flowers, and inner bark of all these species, and others, contribute to the late winter and spring diet. Gray squirrels feed extensively on fungi, berries, and fruits during the summer, ...

Researchers have discovered that giving the species titbits that are softer than their natural diet may be changing ... the introduction of the invasive grey squirrel. Now, they are only found ...

The grey squirrel was introduced into the UK from North America in the 19th century and it displaced the smaller native red squirrel, which is now only found in a few isolated areas. The natural diet ...