gobs and gobs of acorns!
i have read that in the shawnee forest , there are over 30 types of oak trees! i wish i could tell you that i can identify MOST of them. i can't.
the earliest i see squirrels in oak around me is in the first part of august. i find it amazing that the swamp oak in my yard is ready by then as it does not even have leaves on it until the end of may.
oaks vary greatly in size and location. i will only touch on a couple of them and leave the rest for you all to study up on. the only reason i mention these two kinds is because of the great differance between them.
the first is the shingle oak. it is the only oak i know of that does not have the familiar oak leaves. look at them closely. the acorns are really small as well. i have taken squirrels while they were eating them though.
http://www.oplin.org/tree/fact%20pages/oak_shingle/oak_shingle.htmlthis is another nut that would not normally seem worthwhile for a squirrel to mess with. the ones i am familiar with rarely got to a half of an inch(.500) in dia.
the other is just the exact opposite. the burr oak can have some HUGE ACORNS! the variety i am thinking of , we use to call overcup acorns.
http://www.oplin.org/tree/fact%20pages/oak_bur/oak_bur.htmlthose nuts can be around 2 inches in diameter! that's a lot of dinner for a little bushytail!
we are not going to talk about acorns a bunch. they are probably responsible for the biggest mast crops there are most years and assuredly must do a lot towards keeping a large populations of squirrels well fed. they also feed a lot of other critters as well.
you will find them growing in swampy ground(pin oak) and on top of the highest dry ridges. they have lots of holes and are regular den trees.
acorns are easy for young squirrels to eat as they have a softer shell. they make the usual noise looking for them in the trees. a hunter can usually hear the caps and cuttings hitting the forest floor. on some occasions, i am able to hear a little of the grit-grit of squirrel teeth on a nutshell, but, not often. it's the other sounds that normally give them away.
as there are other critters that eat acorns and knock them out, one never really knows ,from whole nuts falling ,what is up an acorn tree. you will find chipmunks, coons and all the birds in the woods up in there. that's why hickory nuts are special! there is no doubt what's up there!
as a general rule , you may find squirrels eating acorns anytime from late august onward. they pack a lot of them around after the nuts fall to the ground. a squirrel just can't stand for a bunch of nuts to be laying all over the top of the ground. it's his bound duty to bury them all! that's why in fall, after the leaves and nuts go down, that's where you will find him. rustling the deep leaves under those big old oak trees!
luck!