The ornamental design for a surveillancecamera, as shown and described.
FIG. 1 is a front, right side, perspective view of a surveillance camera showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view; and,
FIG. 8 is another front, right perspective view thereof, shown installed on a door.
The broken lines showing a door in FIG. 8 depict environmental structure and form no part of the claimed design. The remaining broken lines shown in the drawings depict portions of the surveillance camera that form no part of the claimed design.