• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Search results

thxpress_search_the_forum Search Opus
  1. S

    Tamron 2nd generation SP 150-600mm Di VC USD 'G2'

    For you, other human beings, or wildlife? Keep in mind that the human range of hearing is very different from a lot of animals in terms of frequency range. Think about the high frequency (high pitch) whistles that (most) humans don't hear but dogs obey. Or the high pitches in a lot of bird songs.
Back
Top