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Purdue HEMA lab pioneers field of Soundscape Ecology

Purdue HEMA lab pioneers field of Soundscape Ecology

Brian Pijanowski, Professor at Purdue University in Landscape Ecology, is pioneering the emerging field of Soundscape Ecology, and he's using Wildlife Acoustics SM2 Song Meters to do so. According to Pijanowski, sounds can oftentimes be the first indicators in a host of changes facing a habitat.

Like an acoustic fingerprint, each environment has its very own sonic signature, and that signature is bound to change with changes in its diversity. Using these aural snapshots, scientists are able to see what's happening in a landscape over time. At first glance, it might seem obvious to track the sounds in an environment as a gauge of biodiversity and ecological impact.

“Over increasingly large areas of the United States, Spring now comes unheralded by the return of the birds, and the early mornings are strangely silent where once they were filled with the beauty of bird song.”
       – Rachel Carson, Silent Spring

Wildlife Acoustics at sea, land…and now sky with BBC Cloud Lab expedition!

Wildlife Acoustics at sea, land…and now sky with BBC Cloud Lab expedition!

Not too long ago, we announced that the revolutionary solar-powered research ship, MS Tûranor PlanetSolar had embarked from Boston on its DeepWater Expedition along the Gulf Stream with a Wildlife Acoustics SM2+ bioacoustics recorder and hydrophone in tow.

Now, we are taking it to the skies with the amazing BBC Cloud Lab airship expedition. Starting off from Cape Canaveral and ending in San Francisco, the month-long trip will take a group of scientists over oceans, wetlands, drylands, and deserts. Bat researcher, Jennifer Krauel will be using Wildlife Acoustics SM2BAT+ to study bats and high-flying insects. Jennifer KrauelThe BBC2 crew will film her studies while the ship is above Frio cave in Texas, which is expected to be around the end of October. In a recent blog post, Krauel explains in detail how she tested the device on the airship using various microphone cables and fishing weights. In addition to recording bat passes, Krauel has also installed an insect net outside the ship to collect insect samples. The net has a pouch in the back so that scientists will be able to remove and collect insect samples throughout the trip.

Be sure to stay tuned for updates on the expedition!

Birds pass along secret code to un-hatched chicks

Birds pass along secret code to un-hatched chicks

Before they even hatch, Superb Fairy Wren chicks are learning a secret code that means everything for their survival. The mothers of the chicks sing a special “password” note to their un-hatched chicks, which they must recite once hatched, in order to be fed. No password, no food.

It may seem a bit paranoid on the mother’s part, but there is a very good reason for them to be suspicious. That’s because Cuckoo birds have been known to secretly plant their eggs in Fairy Wren nests. Once the baby cuckoos hatch, they are fed and raised by the surrogate mother. The “pass-note” method then, helps the mother to distinguish which chicks are hers and which are cuckoos. The mother is thought to start singing the note about 10 days after the eggs are laid, giving the chicks just five days to learn it. Cuckoos often only have two days in the nest and therefore don’t have enough time to learn the note. This method isn’t quite foolproof, though. The mothers only catch the cuckoos around 40% of the time. Oftentimes the cuckoo chicks happen to sing the note by trying multiple calls.

Perhaps soon enough the Cuckoos will come up with a counter-strategy of their own for cracking the code. In the meantime, visit our website and learn how our Song Meter SM2+, accessories, Song Stream Remote Access Module and Song Scope software can make your bird call collection and analysis work faster and easier.

Wildlife Acoustics is proud to support wildlife conservation efforts

Merlin Tuttle's Bat Conservation Bat Conservation International Bat Conservation Trust Wildlife Habitat Counsil