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WebJan 1, 2024 · The following is the official list of bird species accepted for Texas by the Texas Bird Records Committee (TBRC) of the Texas Ornithological Society. This list totals 664 species as of January 1, 2024 and includes taxonomic and nomenclatural changes outlined in the 63rd supplement ( Auk, Vol. 139, Issue 3) to the AOS Check-list of North ... WebThe pitch of a song or call is what we hear when a bird vocalizes. Pitch is closely related to frequency, which is the number of sound wave cycles produced in a given amount of time. Frequency is measured in Hertz (Hz; cycles/second). Most bird sounds range in pitch from 100 Hz to 10,000 Hz, but there is a lot of variability both within a ... integrity electrical services company llc
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