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磁感或磁反应是一种感觉，它允许生物体探测磁场来感知方向、高度或位置。这种感官方式被一系列动物用于定向和导航，^[1]并成为动物探知区域地图的方法。对导航来说，磁感应和地磁场的检测有关。

磁感存在于细菌、节肢动物、软体动物以及脊椎动物的各主要分类中。^[1]人类不被认为有磁感能力，但眼睛中的一种蛋白质隐花色素（英语：cryptochrome）可以起到这种作用。^[2]

参见

^ ^1.0 ^1.1 Wiltschko, F.R. & Wiltschko, W. Chapter 8 - Magnetoreception. Carlos López-Larrea (编). Sensing in Nature. Advances in Experimental Medicine and Biology 739. Springer. 2012. ISBN 978-1-4614-1703-3. doi:10.1007/978-1-4614-1704-0.
^ Foley, Lauren E.; Gegear, Robert J.; Reppert, Steven M. Human cryptochrome exhibits light-dependent magnetosensitivity. Nature Communications. 2011, 2: 356 [2019-03-29]. Bibcode:2011NatCo...2E.356F. PMC 3128388 . PMID 21694704. doi:10.1038/ncomms1364. （原始内容存档于2016-09-06）.

Cryptochrome and magnetic sensing. Theoretical and Biophysical Computations Group, University of Illinois at Urbana–Champaign. [2019-03-29]. （原始内容存档于2019-03-29）.
Schiff H. Modulation of spike frequencies by varying the ambient magnetic field and magnetite candidates in bees (Apis mellifera). Comp Biochem Physiol a Comp Physiol. 1991, 100 (4): 975–85. PMID 1685393. doi:10.1016/0300-9629(91)90325-7.
Johnsen S, Lohmann KJ. The physics and neurobiology of magnetoreception. Nature Reviews Neuroscience. September 2005, 6 (9): 703–12 [2019-03-29]. PMID 16100517. doi:10.1038/nrn1745. （原始内容存档于2012-10-18）.
Johnsen, Sönke; Lohmann, Kenneth J. Magnetoreception in animals. feature article. Physics Today. 2008, 61 (3): 29–35. Bibcode:2008PhT....61c..29J. doi:10.1063/1.2897947.