Brendan A. Graham, Ian Gazeley, Ken A. Otter and Theresa Burg, Do phylogeny and habitat influence admixture among four North American chickadee (family: Paridae) species?, Journal of Avian Biology 52 no. 5, Nordic Society Oikos, Published by John Wiley & Sons Ltd, 2021 doi: 10.1111/jav.02695
Ray MughalRaees Mughal is passionate about the beautiful birds, their lives all around the world In his free time, He Loves Reading Books, solitude., Mexican Chickadee (Poecile sclateri) - 5 Interesting Facts, Next Birds, 2021-01-26 (באנגלית אמריקאית)