{"id":1888,"date":"2024-04-10T15:21:13","date_gmt":"2024-04-10T15:21:13","guid":{"rendered":"https:\/\/dailywashingtoninsider.com\/index.php\/2024\/04\/10\/frogs-are-screaming-we-just-cant-hear-them-scientists-in-brazil-discover\/"},"modified":"2024-04-10T15:21:13","modified_gmt":"2024-04-10T15:21:13","slug":"frogs-are-screaming-we-just-cant-hear-them-scientists-in-brazil-discover","status":"publish","type":"post","link":"https:\/\/dailywashingtoninsider.com\/index.php\/2024\/04\/10\/frogs-are-screaming-we-just-cant-hear-them-scientists-in-brazil-discover\/","title":{"rendered":"Frogs are screaming \u2013 we just can\u2019t hear them, scientists in Brazil discover"},"content":{"rendered":"<div>\n<p>Some frogs scream at an ear-splitting volume for other animals but its frequency is inaudible to humans, scientists have discovered.<\/p>\n<p>While out in the Amazonian jungle studying frogs, researchers in <strong>Brazil<\/strong> noticed something strange.<\/p>\n<div class=\"sdc-site-outbrain sdc-site-outbrain--AR_6\" aria-hidden=\"true\" data-component-name=\"sdc-site-outbrain\" data-target=\"\" data-widget-mapping=\"\" data-installation-keys=\"\">    <\/div>\n<p>Small leaf litter frogs were arching their backs, throwing back their heads and opening their mouths wide.<\/p>\n<p>They looked like they were screaming but the scientists could hear nothing.<\/p>\n<p>When they recorded the frogs using high-frequency audio recorders, the scientists captured the first documented case of &#8220;defensive ultrasound&#8221; being used by amphibians.<\/p>\n<div class=\"ad ad--teads\">        <\/div>\n<p>The scream is a response to predators, according to researchers from Brazil&#8217;s State University of Campinas.<\/p>\n<p>It could be a call to arms to attract another animal to attack the predator.<\/p>\n<p>The researchers recorded the distress call on two occasions.<\/p>\n<p>When they analysed the sound using special software, they found that it had a frequency range of 7 kilohertz (kHz) to 44 kHz.<\/p>\n<p>Humans cannot hear frequencies higher than 20 kHz, which are classed as ultrasound.<\/p>\n<p>A researcher on the team, Mariana Retuci Pontes, says she saw frogs exhibiting similar behaviour on a different research trip but didn&#8217;t have the right technology to record the ultrasonic sound.<\/p>\n<p>Bats, whales, rhinos, dogs, pigeons, cuttlefish\u2026 all sorts of animals use infrasonic and ultrasonic frequencies to communicate, and humans can hear none of it.<\/p>\n<p>So the next time you&#8217;re enjoying a peaceful walk, all around you there could be a cacophony of noise.<\/p>\n<\/p>\n<div>This post appeared first on sky.com<\/div>\n<\/div>\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Some frogs scream at an ear-splitting volume for other animals but its frequency is inaudible&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1889,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-1888","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"_links":{"self":[{"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/posts\/1888","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/comments?post=1888"}],"version-history":[{"count":0,"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/posts\/1888\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/media\/1889"}],"wp:attachment":[{"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/media?parent=1888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/categories?post=1888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dailywashingtoninsider.com\/index.php\/wp-json\/wp\/v2\/tags?post=1888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}