1. An image capturing apparatus comprising: an acquisition unit configured to acquire images that are successively captured with an image sensor; a first detection unit configured to continuously detect a predetermined object in the images with image recognition; a second detection unit configured to detect the object by sequentially detecting a movement of a region including the object detected by the first detection unit, in a plurality of successive images included in the images; and an evaluation unit configured to, based on results of detections performed on a predetermined number of preceding images by the first detection unit, continuously evaluate a reliability of a current detection result of the first detection unit, wherein the second detection unit detects a movement of the region including the object currently detected by the first detection unit when the evaluation unit has determined that the reliability of the current detection result is high, and does not detect a movement of the region including the object currently detected by the first detection unit when the evaluation unit has determined that the reliability of the current detection result is low.