The Early Bird occurrence is situated on Reverted Crown Lot 1648 at 1220 metres elevation above sea level, on the south side of Carpenter Creek, in the Slocan Mining Division.

Regionally, the area lies on the western margin of the Kootenay Arc, in allochthonous rocks of the Quesnel Terrane. In the vicinity of the occurrence, the Quesnel Terrane is dominated by the Upper Triassic Slocan Group, a thick sequence of deformed and metamorphosed shale, argillite, siltstone, quartzite and minor limestone. Rocks of the Slocan Group are tightly and disharmonically folded. Early minor folds are tight to isoclinal with moderate east plunging, southeast inclined axial planes and younger folds are open, southwest plunging with subhorizontal axial planes. The sedimentary sequence has been regionally metamorphosed to lower greenschist facies.

South of the occurrence, the Slocan Group has been intruded by the Middle Jurassic Nelson intrusions which comprise at least six texturally and compositionally distinct phases ranging from diorite to lamprophyre. The most dominant phase is a medium to coarse grained potassium feldspar porphyritic granite. Several feldspar porphyritic granodiorite dikes, apparently related to the Nelson intrusions, also cut the sedimentary sequence near the occurrence (Paper 1989-5).

The occurrence consists of an adit driven on fissure veins hosted within a 60 metre wide quartz diorite body. The adit follows a narrow fissure that strikes southwest and dips 60 degrees northeast for about 25 metres from the portal. The adit then follows a fissure striking 165 degrees and dipping 60 degrees west for about 40 metres. The adit also intersects a fissure striking west and dipping 45 degrees south. All fissures are filled with gouge and calcite. Minor sphalerite and galena also occur within the fissure zones.

A total of 5 tonnes were mined from the occurrence between 1908 and 1934 to produce 20,964 grams of silver, 3920 kilograms of lead and 120 kilograms of zinc.