Questions related to Avian Ecology
I need advice for sexing doves by PCR. I have used the 2550F / 2718R and P2 / P8 primers, but they only amplify a minority of the samples. Could you recommend other primers that work for Streptopelia turtur? I have read something about the CHD1F / CHD1R primers (https://journals.sagepub.com/doi/full/10.1177/1040638716675197), although it seems that they did not work well: " Two species from Columbiformes, namely Streptopelia turtur and Streptopelia senegalensis, were also studied; However, no results could be obtained for either species because of the unsuccessful PCR amplification using CHD1F / CHD1R and 2550F / 2718R first sets, respectively. "
Any help is welcome!
Thank you very much =)
I’m looking for literature/advice regarding how to implement a bird survey (abundance/density estimation) in areas/habitats with dense vegetation and rough terrain, like tropical rain forest. It seems to me, that point-counts are the method that best fits such conditions. However, what kind of sampling designs should I implement in order to meet the statistical requirements? That is, in very mountainous areas locating the points randomly or systematically (neither there is apperent stratification) seems almost impossible because of the logistical difficulties of accessing and locating the selected sites. The only viable alternative seems to be to follow trails already present in the area and to locate the plots (with a first random point) along the paths, every 250 m or so. Additionally, I think that some points can be located at both sides of the trails (walking 250 m on either side of the trails may be feasible at some points). However, this “design” seems to violate the assumption of randomness in selecting the sample units. Any comments or suggestion of alternative design will be welcomed.
I was wondering if you know of any case in which breeder/floater ratio in birds is monitored over the years while observing changes in nest-site availability. Floaters in one of my focus populations are very abundant and I would like to discuss to what extent this could be an indicator of nest-site restriction.
While there are a number of studies that employ both constant effort mist-netting and audio-visual survey methods, there are very few that combine the numbers from those surveys into a single database with which to make population estimates and/or calculate diversity. I am looking to combine the two into a single dataset to estimate different facets of biodiversity. At the current state of our collective understanding of how these two broad methods interplay, is it wiser to analyse the two separately or are there options out there for effectively combining them into a single database to analyse?
I have made Recognizer models for a few bird species. This takes up time. I thought it would be good to have a place where people can share ‘Recognizer’ models they have developed for different species and share them with the research community.
I have been trying to estimate rates of mortality due to human causes, but this requires estimates of population size. I have developed two methods for estimating global population size of all birds. However, I wonder if anybody has come up with an alternative estimate.
Thank you for your help.
Anders Pape Møller
I am looking for potential collaborators for a project that seeks to assess the ecological importance of specific tree species of Borneo. I invite interested specialists to message me.
I haven't done habitat use studies, analyzing which local and landscape-level factors best explain bird species occurrence. for several decades, and am wondering if CCA (canonical correspondence analysis) is still considered valid (and used). Looks like most of the references are from the 1980s and 1990s, so I'd be interested to hear if some other method is used instead.
I want to know how to use GLM to compare mean number of granivore birds for "high water level" years and "low water level" years as shown in the picture provided below. This is an arbitrary data set I made up but the data I have is similar and they are not normally distributed. What step should I follow? Where should I start? Should I use GLM or something else? Should I first determine whether the data fits neg.binomial or Poisson distribution? If so, how can I do it with R?
I tried using Mann-Whitney U-test but I think I should use something stronger. I would be glad if somebody can explain to me what to do in plain language. Thanks in advance.
I'm conducting analysis of bird counts for my Master's thesis on effects of patch size and connectivity on birds of High Andean landscapes. My first goal is to use ordination analysis to figure out which bird species are associated to each of the different kinds of habitat (forest, transitional and open matrix). I have lots of environmental/spatial variables recorded, but I decided to begin with an unconstrained ordination, just labeling the sites with different colours according to habitat and checking which sites and which species seem to group together.
My data is not very good (for many reasons, one of them just not having had enough time in the field) but I'm trying to salvage it the best I can. I've ran a CA and a DCA on my species matrix, using vegan package in R, and the procrustes function shows me large (and quite chaotic) differences between the plots from one method and the other. Is this telling me that arch effects or compression of extreme scores is happening with the CA, and so I should opt for the DCA? Or is it just because the CA explains very little variation in the data (the first two axis amount to around 18% of total inertia), so sites and species will just float around with no real meaning when I do the DCA?
A little extra question - would it help me to get more variation explained if I remove from my dataset some of the rarest species or some of the ones that move around the most between the CA and the DCA?
What is the best method to estimate the species richness of birds if we have multiple bird surveys from a single site? Same method (line transect) is employed, with same effort in each survey.
Is species accumulation curve useful in this case, considering each survey as an effort?
And should we use the same curve for migratory species (which are only at that site for few months) and resident species, or we should use different curves for both?
I'm trying to calculate rarefied species richness for data set which looks something like https://ibb.co/bZeALk this. I read the .csv file into R and it was converted to a data frame. Now when I try to operate on it, I always end up with error messages like "Error in round(x) : non-numeric argument to mathematical function". What do I do wrong? I'm setting the sample size as the smallest community size. I'm setting MARGIN=2.
By the way, my goal is to compare these different counts from different years in terms of their diversity and I wanted to use rarefied richness too. They are from the same place but from different years.
Hey everyone, in my thesis one of my goals is to address the current knowledge on solitary bees (group of species). So i made a multiple choice survey covering the basic information about this subject. Which is the best way to analyze data ?
1. What are solitary bees?
A) Bees that do not form Beehive
B) Bees that have separate themselves from the Beehive
C) Bees responsible for collecting food
D) Non-fertile bees
I want to make a QGIS database for my ringing activity. I would like to add my ringing data to ringing place points in a way that more individually ringed birds ringed on a specific location (1 point) would correspond with the point. Can I make a simple shape file with points, or sqlite database? Does anybody have some basic instruction manuals that I could use for this?
I am aware of some work on the affects of anthelmintics on the fauna feeding on dung but was keen to find if wider work has been done on their effects on wider range of pasture insects and the consequence effects on species that feed on them in particular birds. Changes in land use are and to some extent predation are cited as causes of decline of some species of farmland bird, however for some the impact of veterinary medicines on food chains is also a possible contributor and I am keen to find out who and where such wok may have been carried out. Any thoughts welcome.
I'd appreciate advice about acoustic recorders for undertaking surveys for a range of taxa, particularly birds, frogs and microbats (i.e. audible and ultrasonic). The units will be left in situ for days/weeks and will need to withstand a range of environmental conditions (e.g. deserts and wet tropics). I've previously used Song Meters. Is anything better.....that's not considerably more expensive? If not, which Songmeter model would be best? Thanks in advance.
I am comparing bird species diversity and density of three independent sites. Each site has 1 replicate in another location. How do I treat the two replicates per each of these three sites in Principal Components Analysis (PCA).
Is PCA the appropriate ordination method to analyze this type of data. If its the best, how can I use PCs to run ANOVA to compare species diversity and density of the three sites. I also have to compare species diversity and density of the three sites between two seasons.
I am stuck, I will be glad for your help.
To tackle the increasing problems of draw down, depredation and degradation (pollution) of environmental resources we are trying to promote green products, green processes, green technologies, green industry. More importantly we are sensitizing people to adopt green lifestyle, green culture and green consumerism to shrink our ecological footprint and to make a peace with our Mother planet Earth. But it's easier said than done! How 'green' is green enough? How good is good enough? Please elucidate with informative thoughts, insights and illustrative inputs.
I am searching for any data on the density of a birds’ beak (g/cm3). I have so far found one paper on the density of toucan and hornbill beaks (Seki et al. 2010, Acta Biomaterialia 6 (2010) 331–343), showing that the density of these beaks ranges from 0.1 to 0.4 g/cm3, but I suspect these beaks may not be too representative of the ‘average’ bird beak (as far as an average bird beak density makes sense…).
Any suggestions on literature with bird beak density data for other species are highly appreciated!
All the best,
I am interested in literature documenting massive die off due to algal poisoning from different cyanobacteria species ( Microcystis sp., Anabaena sp., etc) of herons, pelicans, ducks. So far I am aware about some papers relating the deaths with poor water quality. I am more focus on cyanotoxin contamination in tissues, lethal dose and so on. Any feedback will be highly appreciated.
Do you know any papers showing the lack of influence the NAO (North Atlantic Oscillation) on acceleration in avian arrivals? I have found very little with no effect and a lot with a positive one.
Kind Regards, Michal Polakowski
I have been working on many aspects of grebe flight, particularly eared grebes (or black-necked grebes) migratory flight.
Unfortunately, there is very little documentation of grebes flying available in the internet (Youtube, Flirck, etc.). Moreover most of these videos do not have the necessary quality to do any kinematic analysis.
Therefore, I would be very thankful if anyone can point me into the direction where to find good videos or share contacts that I could make further enquiries.
I would like to use IB technology PIT tag readers (http://www.ibtechnology.co.uk/) to identify birds entering nest-boxes. I would like to attach the reader to the bottom of nest box, with one antenna placed around nest-box hole.
Because the system would be used in the field, it should be powered by batteries, (preferably - not car or motorbike batteries but e.g. "C" batteries), and should work in the field at least 10-14 days before battery change.
The IB technology (http://www.ibtechnology.co.uk/) Cased EM4102 Data Logger with e.g. EM Datalog Loop Antenna (65 or 80mm) looks like a promising set-up for my purpose, but I wonder whether someone have any experience with using this equipment in field studies? If yes, could you please share your opinion?
I’m a biologist working in Behavioural Ecology. I am trying to determine whether individuals (birds) show preference for certain locations within a treeline. My data are locations for 15 different individuals each with 4- 20 locations (one per day). The treeline is 755 m long, so the location is defined as a continuos variable that ranges from 0 m to 755 m. What I want to know is if one individual’s locations across days are clustered or if the bird locates in the treeline at random each day.
I’ve been doing some reading and I think that a Monte Carlo simulation is what I need to use to compare my data (i.e. the actual locations of the individuals) to the ‘null expectation’ (i.e. individuals’ locations within the treeline at random).
I have never done a Monte Carlo simulation before so I’m not sure where to begin. I would really appreciate your help.
Thanks a lot in advance!
I am looking for reviews or articles which give distances for the following species: Anthus trivialis, Emberiza citrinella, Phoenicurus phoenicurus, Pyrrhula pyrrhula, Miliaria calandra, Galerida cristata, Luscinia megarhynchos, Oenanthe oenanthe. Distances should be from birds as young to a breeding site as adults, or adults coming back as breeding bird. I guess this information will mostly be available from capture-recapture studies with (colour)ringed young/adults? Distances will be used as a guideline for drawing buffers around species presence points in preferred habitat to check if that same habitat occurs also elsewhere within the buffer.
I would like to use audio recordings for determination of individuals. However what is better - to research turnover of individualls annually or for longer period (each two years)? So, main idea is - there are differences in turnover of owls among beech and pine forests?
I have a 3-dimensional NMDS of avian community composition, and I have built predictive models linking site scores to environmental covariates (one for each axis/dimension, so three models) to make spatial predictions across a landscape that estimate a given site's position within the ordination combining predictions for each dimension. Given this, I was hoping to then be able to estimate a given site's avian composition based on it's position (sites scores) within the ordination. I am familiar with OMI, but was hoping to use my existing models to extract or estimate community composition given that I know the site's site scores.
What are the variables/parameters to be undertaken when taking a research on acoustic monitoring of a bird species?
My objective is individual recognition in camera-monitoring of nest attendance by Pied Imperial-pigeons. I've tried placing cotton pads with temporary hair colour in the nest. This produced faint marks at best, sometimes no mark. Marks were hard to see, mostly hidden under the sitting bird, quickly lost in rainy weather. I'd really appreciate information on suitable color products. Also keen to get other ideas for mark application without capture. Thanks!
Preferably for the bill. I have read a similar question and one person suggested crayons. Does anyone have experience with this as far as durability, length of application, etc? This is for emerald toucanets during the rainy season. It only needs to last for a week or two if duration is an issue.
Ahoj everyone, I would be interested in a very simple application where somebody (both researchers, when working and the public, when waiting on a train or sitting on a public bench) could enter 3-4 ring colors of a color-ring marked bird plus either choose a location on a Google map or let the device save the GPS position together with the time stamp and the color code. So the app should just take these data and put it in a database. Any other functionalities like allowing the observer to add a behavioural category or similar would be nice but totally optional. Thanks for any hint whether this is existing somewhere or showing interest if you think the development of such a tool is in your field and scope of activity.
Hello, I've been searching for the information on Component of Pigeon's poop for a week. I still haven't found what I want so finally i come here to ask..
I want to know what kind of compounds Pigeon's poop is consisted of. or (elements with percentage)
I would be very very pleasure if you give me the links of some publications.
have a nice evening.
I have a pretty basic question: I am looking for body mass measurements of ring-necked parakeets (Psittacula krameri) across its native range. I checked the available literature (see google sheet below), and although I can find some data, it is not too much.
Most papers refer to Cramp 1985 (Birds of the Western Palearctic) as source for native range body mass data, but most data I found till date point to lower weights than what is mentioned in Cramp 1985, which states: Gujarat (India): 104–139g (5 birds) (Ali and Ripley 1969); Nepal: April: 136 and 143g.
Any suggestions for data sources, or researchers who could help out are much appreciated.
The link to what I found is: https://docs.google.com/spreadsheets/d/1TL4VwpCPUSwrKX6TLOE3sdXoiP7ZhsnttjE01Em-_DA/edit?usp=sharing
Thanks in advance,
Contact through ResearchGate or via email@example.com
I have good experience in other habitats, but have never tried this one - could it be reasonable to try?
See Breeding Bird Atlas protocol for indices of confirmed breeding (i.e. food carrying, nest material carrying, fledgling sightings)
I recently set up a citizen-science project where online volunteers can help to analyse images from my bird monitoring cameras at remote sites. It's working okay for people who were already familiar with that online platform. Now I need some new people to try this setup, ideally bird-aware people with an interest in science, not necessarily experts. It might take 10-15 minutes to register, view the short tutorial, and complete your first image. Ideal if your time allows for doing more images.
Sign in at http://volunteer.ala.org.au/ and then look for NestCam series.
Really great if you can give me feedback on things you found easy/difficult, interesting/boring... etc. This will help me enhance the experience for future volunteers. Very important because there's a huge number of images to be processed!
Feedback can be in this quesion, or the forum linked to NestCam, or message me here. Many thanks for considering this!
Hello, I want to ask you when (day of gestation) is exactly formed Chorioallantoic membrane (CAM) of Japanese quail. I have a lot of informations about CAM formation in chicken eggs but less informations about Japanese quail.
For three years we had 6 birds deployed with GPS devices that transmitted the GPS location of the birds every hour during day time. This resulted in almost 50 000 data points. From these data I calculated the distance covered by the birds between consecutive point. As these birds (shoebills) do not move a lot, more than 90% of the distances covered are between 0 - 1 km. There seems to be no transformation that can deal with this enormous inflation of values between 0 and 1. The range of distances is 0 - 48 km, the average is 0.56 km (SD = 2.5). I tried several Generalized Linear Models, and even though the outcomes make sense when looking at the data, the distribution of the model residuals show a very skewed distribution. Does anyone have experience with a similar data set and knows how to analyze this?
So, if a bird exists in multiple populations that vary from 0-2,000m above sea level with three distinct color morphs, is there any reason to believe that oxygen availability or structure of the Hb genes would influence the mechanisms behind melanin-based plumage production? I can understand that there are differences in Hb structure from lowland and highland subspecies and there may be shifts in body mass to deal with temperature variation as well. But I'm interested in if there is any basis for wondering if attitudinal gradients may be responsible for phenotypic divergence. Thanks for any insight you may have.
There is a clear evidence in my data, but I would like to have also a statistical evidence
For a study of nesting birds we consider using GPS tags with UHF download facility. I understand Pathtrack and Ecotone can supply them, maybe other manufacturers?
If you've used this kind of system on birds or other species:
Which system did you choose?
How easy/difficult to achieve successful download?
What distance for reliable download?
I will be grateful for your advice, warnings and recommendations, thanks!
- Easily kept in captivity (preferably a small granivore)
- Plumage coloration is involved in mate choice (preferably yellow or red)
- Courtship displays involve movement or a dancing component in addition to plumage coloration
- Native to southeastern US or otherwise able to withstand warmer aviary temperatures
- Affordable in large quantities (for behavior studies)
I am interested in the function of arthropod cocoons occurring in passerines breeding nests (sexual selection, signals, mate quality).
Any idea? Reporting 13 specimens of Tetranychus (males, females and nymphs) inhabiting a bird nest inside a citrus tree. How such phytophagous creatures be there! No contamination happened during mite separation using Berlese funnels. If we said accidentally, but 13!!
I would like to youse a touch screen to record birds' (chicks') pecking behaviour. I would be very grateful if anybody could recommend me a model or a solution that is working successfully in their research. Is there any commercially available model that has a good sensitivity to pecks or only custom made solutions are viable? Thanks!
I am studying the influence of predation danger on the non-breeding distribution of shorebirds. Raptors are the main predator of shorebirds during this period, but I wonder if there are accounts of other predators (terrestrial mammals, reptiles?).
An early inventory of anti-predator tactics (and predators) is here:
Lima SL. 1993. Ecological and evolutionary perspectives on escape from predatory attack: a survey of North American birds. Wilson Bull. 105:1–47.
Any more recent reviews or individual records of shorebird predators?
I am an MSc student and for my final thesis project I had set out to perform a comparative morphometric analysis between three avian families. My own dataset of one family returned results, however the dataset I was sent to perform the comparison with is unusable (none of us can work out why or how to fix this). Sadly, I do not have time to repeat any procedure and am having to settle with extremely restricted, unoriginal results. I have PCA results for all datasets, but as I am unable to run the datasets together, I cannot directly compare them.
I am struggling to write my report as no direct comparison between the groups was possible and as such I have no overall results. Is there a 'way' I can still write a decent report?
As we work with the endangered Puerto Rican Amazon in a Rain Forest were the rats are abundant, I will like to know if based on your experience, unpublished data, necropsy reports, publications, data from other researchers, etc. have evidence of Leptospira as official death cause in birds but my special interest is in psittacines.
A recent single anecdotal observation of a drone deployed to 20m altitude for recreational photography on the beach in Maputo scaring Whimbrel up to 400m away, suggests that some birds may be very sensitive to drones. Are there any studies of the reaction by birds to recreational drones (rather than testing of research drones).
I am looking for experimental data/papers on the salinity and pH of the faeces of a number of commensal bird species in urban environments. In particular I am looking for studies on pigeons, Common/Indian Mynahs, Silver Gulls, Starlings and Sparrows.
I am also keen to hear if people have carried out dietary experiments on these species to see what differences (if any) diet makes on the salinity and pH of the faeces.
I am looking for recommendations on how to measure bird beak morphology (specifically Passer montanus) such as whether I should simply use calipers or use a computer program.
Also, what is the best morphological feature I can look at to compare the beaks with each other? (e.g. depth, length, etc.)
Lastly, what statistical test would be appropriate to show that there is indeed a significant difference?
I am looking for a paper showing that tropical forest birds perform faster and shorter maneuvers than those from open areas. Does anybody know?
Thank you very much.
I am currently trying to find method that is suitable to be used to measure the nesting of a black naped monarch bird. It would be great if anyone can recommend to me suitable method for it. Thank you in advance.
I am planning to establish the quorum sensing inhibition assay and i need tester strain wither c. violeceum or V. harvei. Is anyone can share the culture with me free of cost?
I am working on terrestrial species, Pheasant in tropical areas. Most of them tend to be high abundance in flat rather than steep terrain. These species eat mainly on insects, fruits, seeds, etc. I would like to find references about differences of physical environment or biodiversity (that can provide food for species such as insects,...) between flat and steep habitats so that I can explain for my results. I hope to have help from all of you who are familiar with this topic. Thanks so much for your help.
There are numerous studies of the rarest species in the world, but none of the most common species. Population size is limited by resource availability. In breeding birds, it is also partly limited by maximum foraging distance from a central breeding site. Therefore, maximum size of flocks or colonies may provide important information on population regulation and the influence of diet and trophic level on maximum flock or colony size. Please provide information on species name, date, year, locality, coordinates.
I have shape files of monthly kernel areas for a group of vultures. I also have a shape file of protected areas in a country. I want to determine how much the vultures are using protected areas. I guess this could be done in terms of proportion of time spent in protected areas, or the percentage of points located in protected areas. I'd also like to see if birds are roosting in protected areas, but perhaps feeding outside them, or vice versa, so I might want to divide the data into 'daytime' and 'nighttime', and then look at whether points are inside or outside protected areas. Does anyone have any advice please on a method I could use to do this? Are there repositories somewhere with shapefiles of protected areas for different countries? Thank-you.
I would like to perform a small research studying floral orientation and flight of free-ranging hummingbirds. I plan to use a feeder with different nectar holes resembling different floral orientation. What nectar recipe is recommended? I am considering to make the feeder as a DIY project.