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Kristal Kostoglou

@_Kristal_K

1⃣ #ISTC20 #Sesh8 👋I'm a PhD candidate exploring #shorebird communication across the eggshell in Melbourne, Australia. Some avian embryos can begin calling late in incubation and can communicate with parents through the eggshell🥚Have a listen to these embryonic calls, below!

2⃣ #ISTC20 #Sesh8 Visual egg and nest crypsis is a common shorebird defence strategy but some predators may use embryonic vocalisations as an acoustic cue to locate these hard to find nests🦊

3⃣ #ISTC20 #Sesh8 We know that shorebird hatchlings rely on acoustic crypsis, hiding and becoming silent in the presence of a predator🐣 So, could this defence strategy begin prenatally and do embryos cease calling when exposed to signals that suggest a predator is nearby?

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Batbayar Galtbalt

@Batbr19

1/6 #ISTC20 #Sesh8
Knowing where (how high) birds fly in the air is important in this changing world. Because we have windfarms, airplanes, and tall buildings, all of which have the potential to impact the flight altitude of avian migrants. #ornithology #ClimateChange

2/6 #ISTC20 #Sesh8
R.Q: What are the important drivers for flight altitude selection of avian migrants?

Studies (radar) suggest migrants select flight altitude to maximise wind support. However, a few have taken a quantitative approach. So, we tested these 4 hypothesis:

3/6 #ISTC20 #Sesh8
To test these hypotheses we used the GSM-GPS tracking data of far eastern curlew and whimbrel.

We compared weather conditions of altitude bins at which birds migrated with other altitude bins that birds did not choose to migrate, using 'coxph' model.

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Victorian Wader Study Group

@vwsg_web

1/6 140 VWSG volunteers have been monitoring waders in SE Aus for 40 years. We have several important sites around Victoria, Tas & S. Australia for catching and banding waders. Data are used for pop monitoring, migration route, survival and repro rate assessment
#ISTC20 #Sesh8

2/6 Using geolocators we have revealed the AMAZING migration of Ruddy Turnstones. Flagging shows individuals return to exactly the same stretch of beach on King Island each summer. Adult birds migrate ~12,500km to Siberia to breed before returning
#ISTC20 #Sesh8

3/6 Curlew Sandpipers are experiencing drastic population declines. Through tracking, we find that they leave earlier, use fewer sites, are more site specific, and arrive later than Red-necked Stint, which has only minor population declines. #ISTC20 #Sesh8

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