The Birds and the Trees

Modification of natural habitats used by native organisms is occurring more rapidly due to the increasing human population. American Robins (Turdus migratorius) are common in urban and non-urban areas and can serve as useful indicators of human activities\u27 effects on wildlife. To create an urban environment, sometimes the removal/addition of native/non-native trees from non-urban habitats is necessary which can alter the presence or success of native avifauna. This study, therefore, examined the influence of tree cover within urban and non-urban sites and how trees\u27 characteristics affected the survival rate of American Robin chicks. Data collection occurred during the 2019 breeding season (May-August) at twelve nesting sites that were categorized urban or non-urban based on distance from the city center of Greeley, Colorado. Nest monitoring occurred from clutch initiation to fledging. A circular plot (0.2 ha), with the nest at the center, was surveyed for tree density, tree height, the diameter of trees, and cover provided by the trees. I found that a single principal component could explain \u3e55% of the variability in plot characteristics surveyed, but this variable did not significantly predict nest survival (Linear Regression: p=0.2721). I found no difference in clutch survival between urban and non-urban sites (Wilcoxon 2-sample Z-test: p=0.7483). Results suggest that American Robins, regardless of urban or non-urban habitat characteristics, are nesting in locations similar in number, diameter, and height of trees as well as in areas with the same amount of cover provided by trees. Bird populations in North America have declined by 2.9 billion individuals since 1970. Considering many of these populations have been classified as stable until this time, continued investigation of how vegetation characteristics contribute to clutch survival rate, and by extension, population levels is an essential step to avian conservation in urban landscapes of the world

Behavioral, morphological, and ecological trait evolution in two clades of New World Sparrows (Aimophila and Peucaea, Passerellidae)

Copyright 2020 Cicero et al. The New World sparrows (Passerellidae) are a large, diverse group of songbirds that vary in morphology, behavior, and ecology. Thus, they are excellent for studying trait evolution in a phylogenetic framework. We examined lability versus conservatism in morphological and behavioral traits in two related clades of sparrows (Aimophila, Peucaea), and assessed whether habitat has played an important role in trait evolution. We first inferred a multi-locus phylogeny which we used to reconstruct ancestral states, and then quantified phylogenetic signal among morphological and behavioral traits in these clades and in New World sparrows more broadly. Behavioral traits have a stronger phylogenetic signal than morphological traits. Specifically, vocal duets and song structure are the most highly conserved traits, and nesting behavior appears to be maintained within clades. Furthermore, we found a strong correlation between open habitat and unpatterned plumage, complex song, and ground nesting. However, even within lineages that share the same habitat type, species vary in nesting, plumage pattern, song complexity, and duetting. Our findings highlight trade-offs between behavior, morphology, and ecology in sparrow diversification

Assessing the similarity of song-type transitions among birds: evidence for inter-species variation

Permission to archived accepted author manuscriptIn many species of songbird, individuals sing multiple song types, some of which are shared with their neighbours. Individuals may also share syntactical rules that govern the transitions between different song types, but few studies have attempted to study this kind of sharing. Progress has been inhibited by a lack of statistical tools to compare song-type transitions among individuals. We present a straightforward method for comparing song transitions based on Markov transition matrices. The method calculates the number of mutually preferred song-type-to-different-song-type transitions found in the song sequences of two birds, then assesses whether that number is significantly greater than would be expected if the two birds ordered their songs independently of one another. We applied this method to song sequences from five songbird species. All pairwise comparisons among male Cassin's vireos, Vireo cassinii, showed significant similarity in song transitions, as did a minority of comparisons among Adelaide's warblers, Setophaga adelaidae, and one pair of marsh wrens, Cistothorus palustris. In contrast, dyads of rock wrens, Salpinctes obsoletus, and rufous-and-white wrens, Thryophilus rufalbus, did not share song-type transitions at levels exceeding chance. Interterritory distance was not significantly related to our measure of song transition similarity in any of our study species. These results provide evidence that interindividual similarity in song-type transitions is a trait that varies considerably among species. We discuss the potential drivers of similarity in song transitions, but note that assessing its evolutionary breadth will require a larger sample of species. The application of our method to additional species will provide a more comprehensive understanding of signal use and vocal interaction in songbirds.Ye

The evolution of vocal duets and migration in New World warblers (Parulidae)

This is a pre-copyedited, author-produced version of an article accepted for publication in The Auk following peer review.Vocal duets occur when 2 individuals vocalize in temporal coordination. In birds, duet participation functions to cooperatively defend shared resources, localize mates, and in some species, guard the mate. Previous work indicates that duetting tends to co-evolve with a non-migratory lifestyle, probably because the absence of migration facilitates greater cooperation between mates. We examined the evolution of duetting and migration in New World warblers (Parulidae), a group that has been largely ignored by duetting research. Of the 95 species in our analysis, we found evidence of duetting in 19 (20%) species, and evidence of migration in 45 (47.4%) species. Ancestral character reconstruction indicated that the last common ancestor of the New World warblers did not duet. Duetting evolved multiple times in this group, including 2 early origins and several more recent origins. Migration was present in the last common ancestor and was lost several times. Both duetting and migration exhibit phylogenetic signal. A phylogenetically explicit correlation analysis revealed a significant negative relationship between duetting and migration, in keeping with findings from other avian taxa. This study, the first description of the evolution of duetting in a large avian family with a temperate-zone origin, supports the hypothesis that duetting co-evolves with a sedentary natural history in birds.Ye

Data from: Rock wrens preferentially use song types that improve long distance signal transmission during natural singing bouts

When animals are capable of producing variable signals they may preferentially use some signal types over others. Among songbirds, individuals are known to alter song type form and usage patterns in contest and mating situations, but studies have not examined how song choice improves signal efficacy during broadcast song. For this study we investigated rock wren Salpinctes obsoletus song type use rates during natural singing bouts. We tested three hypotheses for adaptive song use during broadcast song: 1) birds improve signal content by increasing the use of high quality songs, 2) birds optimize for signal propagation by preferentially using songs that transmit well, and 3) birds maintain energy by reducing the use of costly songs. The study included 19 058 songs sung by 12 individuals, each of which had a measured song repertoire of between 52 and 117 song types which were produced at highly variable rates. Results indicated that rock wrens did not preferentially sing song types with shorter durations or fewer frequency switches, as would be expected if they selected song types to minimize delivery costs. They also did not favor songs with more rapid trills or more frequency switches, as would be expected if they adjusted song use primarily to indicate quality. Focal birds did preferentially sing significantly longer songs with lower bandwidths, lower frequencies, and slower trill rates. Results suggest that natural broadcast singing patterns are shaped more by the benefits of long distance transmission than by the benefits of advertising performance ability or the costs of song production

Rock Wren song data - Benedict and Warning JAB 2017

Spreadsheet containing song type measurement and use data for all song types sung by 12 individual rock wrens included in the study

Islamic modernity and the Re-enchanting power of symbols In Islamic fantasy serials in Turkey

throughout the Turkish modernization experience, one thing has remained the same: modernization has been defined with reference to the West. This frame of reference has either taken the form of admiration or distaste. Modern Turkey has been seeking the affirmative gaze of the West: whenever a major event, disaster, or success takes place in Turkey, newspapers devote a section to its echoes in Europe. This can concern a sports event, such as a football match, a natural catastrophe, or a social and political disaster, such as the assassination of a Turkish journalist of Armenian origin, Hrant Dink. If the European gaze approves of Turkish behavior, Turks are supposed to be proud. If poor infrastructure or corruption leads to a catastrophic end, newspaper headlines mourn that Turkey has been disgraced in the eyes of Europe. I remember writing an essay at the age of eight on the comments published in the international press following the death of the founding father Mustafa Kemal Atatürk. Even in the realm of political history, the European opinion on Turkey is important. In the writings of the late Ottoman intellectuals, such as Ahmed Midhat or Mahmud Esat, there was either a fear of "the corrupt aspects of European civilization" or an admiration for the "spiritual aspects of Western civilization" (Berkes 1964, 285, 287). Ziya Gökalp combined the two approaches and argued that civilization is a transferable intergroup achievement, whereas culture is specific to specifi c national groups (in Berkes 1936, 243). According to Gökalp, it was legitimate to borrow from European civilization, as long as the authentic Ottoman culture was preserved. With first the establishment of the republic in 1923, and then subsequent steps designed to make Turkey a Western-style state and society, it was already apparent that Turkey opted for the West. Yet the Turkish Republic would continue to rely on symbols as the sole measure of change. In the course of the modernization process, "secularism à la turca" emerged. Instead of withdrawing from religious affairs, the state put all religious activities under direct control. In 1924, the Directorate of Religious Affairs was established as a state branch. Currently, this institution is responsible for "regulating all work related to the practice of Islam, managing the conduct of places of worship, and enlightening society about the issue of religion."1 In 1928, the constitutional article proclaiming Islam the official religion was annulled, and in 1937, the concept of secularism was incorporated into the constitution (Sakallioǧlu 1996, 234). As a result of this control over religion, two kinds of religious "reality" coexist in Turkey. On the one hand, there is the state, which, in theory, controls the religious behavior of people. On the other hand, in everyday life Islam constitutes an integral element of daily cultural practice-which does not always correspond to a fundamentalist mode of existence. While the state has mobilized certain symbols for its nation-building project and the republican cause, it has also tended to ignore or undermine the symbols that belong to the Ottoman past and traditional Islamic society. Whenever religious symbols become contentious, and gain "political" meaning, the state has shown itself to be alarmed that its own symbols and goals are threatened. The headscarf issue has been one of the most notorious cases. Trouble began in 1969, when a student who wanted to wear her headscarf during lectures was expelled from university. The Council for Higher Education (Yükseköǧretim Kurumu [YÖK]), banned the headscarf in universities in 1982. The Council lifted this ban in 1984. The headscarf was again banned in 1987, only to be officially allowed in 1990. In 1997, students with headscarves were banished once more.2 On February 2008, the president of the republic, Abdullah Gül, approved a constitutional change allowing the headscarf in universities. Still, the legal status of the headscarf remains undecided. Space is another tool used by the state for its nation-building goals. The new capital, Ankara, was established as the republican center and rebuilt in accordance with the new republic's political agenda. The streets of Ankara were named after the republican elite and in accordance with nationalist concepts. Scenes from the Independence War of 1919- 1922 were kept alive by the various monuments erected all over the city. Ankara was regarded as a blank canvas where the new Turkish state could paint its history and construct its future. Istanbul, on the contrary, was ignored during these early years because it was considered a symbol of the unfavorable and preferably distant imperial past. However, in 1994 Istanbul reentered the clash of symbols through the May 29 celebrations commemorating the five hundredth anniversary of Istanbul's conquest by the Ottomans. Istanbul was appropriated by the Islamist majority and presented as one of the central constituents of Islamic culture (Çinar 2001, 383). The celebrations began after the election of the Islamist city administration from the Refah Partisi (Welfare Party) in 1994. Prayers followed theatrical demonstrations of Istanbul's conquest (Çinar 2001, 366). As the case of the headscarf and the existence of state institutions such as the Directorate of Religious Affairs clearly demonstrate, state behavior in the realm of religion can be defi ned as a regulation of practices and the control exercised over symbols. Yet the state has not always been successful in eradicating traditional symbols and replacing them with its own. The headscarf ban in the public sphere did not result in a decrease in the number of women wearing headscarves. On the contrary, the fashion industry created new styles of headscarves for women, using lively colors and designs, with the result that the headscarf became even more visible. Just like colorful headscarves have become favorite with the new Islamic classes in the cities, authentic Islamic television series have underlain the presence and popularity of Islamic television channels. Television serials form a very important part of entertainment on the screen, and more than a hundred serials are produced per annum. Some of them become popular, whereas those lacking such popularity are often discontinued after a few episodes. During the last eight years, serials promoting an Islamist morality have been among the most popular programs on Turkish television. Islamist channels produce a kind of fantasy serials deeply influenced by some Western productions, although they give an Islamic interpretation of the originals. These fantasy serials adopt magical plots such as time travel, angels disguised as ordinary people, and appearing or disappearing objects and people. Several serials are set in the afterlife, from which the main character looks back on his or her life on earth. The producers refrain from naming a specific genre for these serials, and simply say that "these are original formats never tried before."3 However, I will refer to them as fantasy serials, because of the many magical and supernatural events that occur in them. This chapter focuses on popular fantasy television serials produced by Islamic channels, in particular STV (Samanyolu TV). I explore plots and narrative styles, as well as the various meanings of the symbols that are used. Although the serials are apparently concerned with spreading Islamic morality, the question remains why they use "original formats never tried before" instead of the documentary genre. Also, is there really a contradiction involved in the Islamist adoption of Western genres and the reproduction of Western serials in terms of their own concepts? And what does this choice tell us about Turkish modernity in particular? For some time now, variations of the original format have been produced by almost all secular and Islamist channels. The serials have been designed to appeal to both types of audience, and their popularity provides a good opportunity to take a fresh look at the labels "secularist" and "Islamist" in the Turkish context. Islam, or Islamist, channels will not be treated as an isolated object of study, but as one of the constituent elements of contemporary Turkish political culture. Thus, one can investigate how the Islamic moral message delivered through TV serials and the idea of reproducing Western serials come together and, in this case, why the labels "Islamist" and "secular" do not have to be mutually exclusive. In order to deal with these questions, the place Islam presently occupies in Turkish television will be studied. The Islamist channels broadcasting the serials will be introduced. Next, the fantasy serials will be explored by means of different examples, and an analysis of their plots and characters will be given. Different variations of the original serials will be described. Although the examples will mostly concern Islamist programs, their secular counterparts- which are not produced anymore-will also be mentioned, so as to compare secular and Islamist versions. In the fi nal section, the concept of reenchantment will be suggested as an alternative framework for studying the emergence and popularity of fantasy television serials. Also, an interpretation of Turkish modernity will be offered. Copyright © 2011 by University of Texas Press. All rights reserved

Data and code for Animal Behaviour manuscript "Assessing the similarity of song-type transitions among birds: evidence for interspecies variation"

Data and code for the Animal Behaviour manuscript entitled "Assessing the similarity of song-type transitions among birds: evidence for interspecies variation".<div><br></div><div>Within this fileset is a zip file containing one R script ("Similarity of Song Type Transitions.R") and five data files in .RData format.</div><div><br></div><div>Each data file contains the transition matrices for one of the five species included in the study. For a species represented by N individuals, the RData file contains N transition matrices.<br><br>The code reads in the song transition matrices contained in the five data files, and makes pairwise comparisons of transitions of all individuals included. <br><br>Results are then summarized in an R object called "Results". Additional details are provided as comments within the R code.</div