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You can follow each and every #ORNITHOLODAY on the BOU’s @IBIS_journal Twitter account (you will see all the tweets from our account during the day including the #ORNITHOLODAY tweets) or saving the #ORNITHOLODAY hashtag (see #ORNITHOLODAY tweets only).
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14 AUGUST 2019
Sarah Winnicki @skwinnicki, University of Illinois, US @Illinois_Alma
Grow, baby bird, grow!
Baby birds may grow at varying rates and develop individual body parts at different stages in their development—this variation is present not only between birds of different species but also between members of the same species or even between siblings in the same nest! We want to understand the relationship between this development and variation in nestlings’ natal environments. Do nestlings with
more food grow faster or leave the nest earlier? Do individuals who suffer from higher nest predator risk invest more in the growth of structures that help them escape predators rather than other body parts? Do brood parasites like cowbirds (that lay their eggs in other birds’ nests) affect the growth and development of host offspring? We assessed these questions and more in a community of threatened grassland bird species whose growth environments are particularly extreme.

3 JULY 2019
Nicola Hemmings @HemmingsNicola1 and the Department of Animal and Plant Sciences @SheffieldAPS
University of Sheffield, UK

The implications of egg failure for threatened species
The avian egg is a remarkable feat of natural engineering. From its protective outer shell, to its nutrient-rich yolk, this self-contained vessel has allowed birds to reproduce in virtually all terrestrial habitats. However, despite possessing a suite of adaptations to ensure the survival of the developing embryo, eggs often fail to hatch – particularly in threatened species.

In the next #ORNITHOLODAY, Dr Nicola Hemmings and her team will discuss why eggs fail and the implications this can have for threatened bird populations. In addition to dozens of interesting egg facts, there will be a chance to learn first-hand how to dissect and examine unhatched eggs, with live tweets direct from Nicola’s lab at the University of Sheffield.

20 MARCH 2019
Brandon Edwards @bedwards144
University of Guelph, Canada

Comp Sci Birding: The use of R in ornithology for informing management decisions of species at risk
The increasing use of highly complex models in ecology has led to the need for ecologists to become well-versed in scientific programming languages such as Julia, Python, and R. Environment agent-based models (eABMs) and hierarchical Bayesian models are two classes of computationally expensive models that have gained traction in the conservation community over the last number of years. eABMs allow for the simulation of the life cycle of one or more population of animals and can be used to
inform management decisions of species-at-risk. Hierarchical Bayesian models have been used by North American Breeding Bird Survey researchers to calculate trend estimates for populations of species over time. Given the usefulness of these models, my research focuses on the development of software packages in R to allow researchers easier access to these otherwise complex and computationally expensive models.

Kirsty Franklin @kirstyyfranklin, Agnes Olin @agnesbirgitta and other #WSTC5 organisers.
#WSTC5 and World Seabird Twitter Conference

The World Seabird Twitter Conference (WSTC) is returning for its 5th year in a row from 9-11 April as #WSTC5. With abstract submission open (until 15 February), we thought it would be a great opportunity to look back at our four previous and very successful Twitter conferences, and show you the benefits of submitting an abstract and getting your research or conservation work out to a global audience from the comfort of your own chair!

During our #ORNITHOLODAY, we will highlight previous presentations and their stories from those participating in WSTCs, show you the geographical reach and diversity of speakers from previous conferences, as well as providing you with some tips and tricks on how to make the most of your tweets, plus much more! It will also allow us to highlight our amazing sponsors, previous keynote speakers, and not forgetting all the early career researchers who make this whole thing possible.

Each World Seabird Twitter Conference is run totally by volunteers as a global event to benefit seabird research and conservation by promoting the work undertaken by our seabird community which forms part of the wider ornithological community.

23 JANUARY 2019
Elina Mäntylä @elinamantyla
@FU_Berlin | @UniTurku | @EcologyResearch
The attraction of insectivorous birds to herbivore-damaged trees

Plants damaged by arthropods can call for help from predators by emitting volatile organic compounds (VOCs). Leaves of herbivore-damaged plants also reflect less light than leaves of undamaged plants. Using these olfactorial and visual cues, predators and parasitoids are able to detect damaged plants from a distance, before they see or smell the actual arthropods. The role of arthropod
predators and parasitoids is well studied in this trophic level interaction but recently there has been several studies showing that also birds can use the same olfactorial and visual cues during foraging. And plants benefit of birds removing the herbivorous arthropods.

7 JANUARY 2019
Prof Stuart Bearhop @StuBearhop | @UoExeterCEC, UK

#ORNITHOLODAY Live from the Kenyan Rift Valley!

We’re launching #ORNITHOLODAY live from the Kenyan Great Rift Valley where Stu Bearhop’s Masters students will be on their annual field course, with a focus on Hell’s Gate National Park and Lake Naivasha.

Hell’s Gate was famed for its vast vulture populations, but as has been seen right across Africa, these populations have suffered severe declines, with poisoning a serious threat to remaining populations. Stu’s team will discuss the issues around vulture declines and the impacts this is having within the wider ecosystem.

Lake Naivasha’s fish community has been massively impacted on by changes in climate, fishing effort and the introduction of invasive species such as the common carp (a freshwater fish). Stu’s team will discuss these issues and the wider impacts they have on the biodiversity of the lake and surrounding area.

White-backed Vulture: Dick Daniels CC BY SA 3.0 Wikimedia Commons
Lake Naivasha: flightlog CC BY SA 2.0 hu.m.wikipedia.org

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If you want to know more about #ornitholoday, or book a day with us, then get in touch with us via Twitter or email:
Steve Dudley @stevedudley_ or email Steve
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