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BOU 👩🏻‍🏫👨🏿‍🏫🧕🏽👳🏽‍♂️ 🌈 @IBIS_journal

4 weeks ago

We’re now having a lunch break here in person at #BOU2024 whilst enjoying some fantastic posters. If you can’t be here in person, don’t worry about missing out as all posters are summarised in 🧵s. Just search for #BOU2024 #Break1 and #Break2 to check them out!

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Anthony Gaston @knomealone2

4 weeks ago

#BOU2024 #break1 6/Sparrows density is positively correlated with human density, probably because the city core provides more opportunity to find heat sources and feeders. Recent decline in numbers may relate to increased Cooper’s Hawks downtown.

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Anthony Gaston @knomealone2

4 weeks ago

#BOU2024 #break1 5/ Density estimates: camps were located by walking a sample of streets in 9 Ottawa districts, varying from affluent suburbs to urban core. Sparrows density was estimated based on mean counts of camps, summed.

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Anthony Gaston @knomealone2

4 weeks ago

#BOU2024 #break1 4/ Sex ratios in camps are 50:50. Calling and displaying occur in camps, especially after midwinter. The calls can be heard up to 100 m away: useful for location.

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Anthony Gaston @knomealone2

4 weeks ago

#BOU2024 #break1 3/ Camps may be occupied at any time but continuously from late October to late March, depending on weather. On fine days in March birds disperse, returning if temperature falls.

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Anthony Gaston @knomealone2

4 weeks ago

#BOU2024 #break1 2/ In Ottawa, House Sparrows are close to their limit of survivable conditions. Winter food is mainly from feeders. As in most of N America, numbers in Ottawa have decreased recently: rather abruptly during 2001-2007.

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Anthony Gaston @knomealone2

4 weeks ago

#BOU2024 #BREAK1 #ornithology 1/ I studied the ecology of House Sparrows in Ottawa, Canada, over 5 winters (2019-2023), recording numbers, distribution and behaviour. They spend the day in persistent aggregations of 10-100 birds (camps).

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Hannah Coburn @HannahECoburn

4 weeks ago

Ultimately, I will be combining this productivity data with ringing data in an integrated population model to assess the status of the population, harvest sustainability & drivers of decline. Feel free to ask any questions or come & say hi at #BOU2024 6/6 #BOU2024 #BREAK1

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Hannah Coburn @HannahECoburn

4 weeks ago

This summer I will be searching for & monitoring 🦆 nests & conducting brood surveys to gather data on key productivity parameters. I’ll also be using GPS tags to track breeding females & uncover their nest habitat preferences & brood movements 5/6 #BOU2024 #BREAK1

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Hannah Coburn @HannahECoburn

4 weeks ago

I will be using ring-recovery data to assess demographic, temporal & spatial variation in survival rates. I’m also using this data to study movement behaviour & key areas of mortality. Most UK-ringed mallards are recovered via hunting, most often in 🇫🇷🇳🇱&🇩🇰 4/6 #BOU2024 #BREAK1

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Hannah Coburn @HannahECoburn

4 weeks ago

Drivers of this decline are unclear. Possibilities include short-stopping & over-harvest. We lack contemporary, UK-specific estimates of survival & productivity rates key for population management. We also know little about 🦆 movement ecology & habitat needs 3/6 #BOU2024 #BREAK1

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Hannah Coburn @HannahECoburn

4 weeks ago

Mallards are a familiar species, well-loved by the general public & widely hunted. UK winter numbers are inflated by migrants & game-farm 🦆 released for shooting. While breeding numbers appear steady, the UK winter population has been declining for ~30 years 2/6 #BOU2024 #BREAK1

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Hannah Coburn @HannahECoburn

4 weeks ago

Despite being a ubiquitous feature of UK wetlands, there is still much we don’t know about mallards. I’m a 1st year PhD student at @EssexLifeSci aiming to change that by studying mallard survival, productivity & movement 1/6 #BOU2024 #BREAK1