Red-eyed Vireos (Vireo olivaceus) are olive-green above and clean white below with a strong head pattern: a gray crown and white eyebrow stripe bordered above and below by blackish lines. The flanks and under the tail have a green-yellow wash. Adults have red eyes that appear dark from a distance; immatures have dark eyes. They forage in deciduous canopies where they can be difficult to find among the green leaves. They move slowly and methodically, carefully scanning leaves above and below for their favored caterpillar prey. However, their habit of near-incessant singing in summer, sometimes more than 20,000 per day by a single male, helps draw attention to them. Large expanses of deciduous forest, particularly deciduous trees with large leaves (such as maples), typify Red-eyed Vireo habitat during the breeding season. On migration, look for them in nearly any type of forest, woodland, or woodlot (particularly in deciduous stands). It is often the commonest of vireo migrants.
The cache is placed along a seasonal road that is unplowed during the winter. You will need to bring your own writing instrument to sign the log. You will have to cross a small ditch, so you might want to bring boots.