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Passerines vs. non-passerines

Explanation of the difference between the two orders

As shown in the second-tier header above, bird species are generally subdivided into "passerines" and "non-passerines". Family groups 1-14 comprise the non-passerines, 15 contains semi-passerines and 16-26 comprise the passerines. What is the difference between the two? (Note: There is an equivalent page about passerines and non-passerines spotted in Arabia.)

The answer is quite straight-forward, once one knows the Latin name of the common House Sparrow - "Passer domesticus". Passerines are birds that, like the House Sparrow, have three toes forward, one backward, e.g. when sitting on a perch, non-passerines don't. As a rule of thumb, songbirds are passerines, others are not.

But there are some more subtle rules to this. There is also a distinction by the birds' voice boxes (their "syrinyxes"). There are a number of birds that have a passerine foothold, but a more primitive syrinyx than the true songbirds. These are often called "suboscines" (where true passerines are "oscines") or also "semi-passerines".



Examples are yet to be filled in.

These pages are largely based on our own observations and those of our contributors. The structure of these bird pages is explained HERE. For more salient facts on any bird species please refer to a field guide.

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