#Loxia leucoptera | Explore Tumblr Posts and Blogs

squawkoverflow · 2 years

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A new variant has been added!

Two-barred Crossbill (Loxia leucoptera) © Francis Orpen Morris

It hatches from available, black, bold, large, nomadic, overall, red, small, stocky, unique, white, and yellowish eggs.

squawkoverflow - the ultimate bird collecting game 🥚 hatch ❤️ collect 🤝 connect

#squawkoverflow #two-barred crossbill #loxia leucoptera #birds #francis orpen morris

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jadafitch · 3 months

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White-winged Crossbill (Loxia leucoptera)

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transbirds · 3 years

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White-winged Crossbill (Loxia leucoptera)

#white-winged crossbill #loxia leucoptera #fringillidae #passeriformes #birds #tony leprieur

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bigbirdpoof · 3 years

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White-winged Crossbill (Loxia leucoptera)

#white-winged crossbill #loxia leucoptera #fringillidae #passeriformes #birds #tony leprieur

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birdsagainstgravity · 3 years

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White-winged Crossbill (Loxia leucoptera)

#white-winged crossbill #loxia leucoptera #fringillidae #passeriformes #birds #michael loyd

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birdstudies · 6 years

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December 2, 2017 - White-winged Crossbill (Loxia leucoptera)

These finches are found in the boreal forests of North America. Foraging in flocks, they eat the seeds of conifers such as spruce and tamarack, using their specially adapted bills to pry apart cones and extract the seeds. While some crossbills’ lower beaks cross on the left, those with beaks that cross on the right are three times as common. Breeding whenever food is plentiful enough, they build cup-shaped nests from twigs, grass stems, lichen, birch bark, rootlets, hair, and cocoons.

#white-winged crossbill #crossbill #loxia leucoptera #finch #bird #birds #illustration #art #woodland #birblr art

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elwingflight · 3 years

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My last year bird of 2020- a lovely flock of white-winged crossbills (Loxia leucoptera) feeding in some spruce trees on campus as snow fell around us. These finches spend most of their time in the boreal forest, but they irregularly move south in winter, following good crops of spruce cones. The tips of their bills are crossed to help them pry the cones open and extract the seeds!

#birds #birding #nature photography #sorry to the people who follow me on other social media and have had to see these photos like 4 times lol #they made me very happy! and also I actually have time to go through photos right now lol. I have so many nice ones from oct/non #*nov. that I feel weird sharing now

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goodbearblind · 4 years

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Posted @withrepost • @markusvaresvuo Hi, 0808 shows a male Two-barred Crossbill (Loxia leucoptera, kirjosiipikäpylintu) taken in Helsinki Finland November 2019. Canon 1DX mkII+ 600mmf4.0 III+ 1.4X, 1/400s, F5.6, ISO3200 #teo-barredcrossbill #bändelkorsnäbb #kirkosiipikäpylintu #canonambassador #canonnordic #1DXmkII #liveforthestory #natgeo #birdsofinstagram #nature_perfection #naturehippys_ #igscwildlife #igbest_shotz #ig_cutestanimals #your_best_birds #nuts_about_birds #instanaturefriends #yleluonto #canon_photos #splended_animals #pocket_birds #Macro_vision #bb_of_ig #canonuk #mrjangear #planetbirds https://www.instagram.com/p/B4xdd2fCe7m/?igshid=199b1gqfdtb46

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nunoxaviermoreira · 4 years

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Loxia leucoptera by MarttiPeramaki Two-barred crossbill, female. Kirjosiipinaaras. Linturetkuilu kannattaa aina! https://flic.kr/p/2hG3YqG

#IFTTT #Flickr

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sciencespies · 4 years

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Roadkill study identifies animals most at risk in Europe

https://sciencespies.com/nature/roadkill-study-identifies-animals-most-at-risk-in-europe/

Roadkill study identifies animals most at risk in Europe

Around 194 million birds and 29 million mammals are thought to be killed each year on European roads, according to a new study that has ranked the most vulnerable species. An international research team used 90 roadkill surveys from 24 European countries to create a new method of estimating both the birds and mammal species killed most often on roads, and the species most vulnerable to being wiped out of certain areas. The research, published in Frontiers in Ecology and Environment, found that the species killed most often were not necessarily the ones most vulnerable to disappearing completely. This means action to preserve wildlife when new roads are built risks being targeted at the wrong species based on current methods.

Dr Manuela Gonzalez-Suarez, an ecologist at the University of Reading, and co-author of the study, said: “Road densities in Europe are among the world’s highest, with 50% of the continent within 1.5km of a paved road or railway. Roads are therefore a significant threat to wildlife, and evidence shows deaths on them could even cause some species to disappear completely.

“Despite this, the long-term vulnerability of species is not currently considered when assessing the impact of new roads on wildlife, meaning we risk channeling support to the wrong species, doing nothing to help those most at risk. Better understanding which species are most vulnerable to roads is therefore important if we are to take more effective conservation action.”

The research team, led by the Centre for Environmental and Marine Studies (CESAM) in Lisbon, calculated roadkill rates for 423 bird species and 212 mammal species. They found that small animals with high population densities and which reach maturity at an early age were most likely to be killed on roads. Nocturnal mammals and birds with a diet of predominantly of plants and seeds were also shown to have higher death rates.

The animals with the highest predicted roadkill rates were the common blackbird (11.94 per km/yr) and soprano pipistrelle bat (1.76 per km/yr). Roads in Central Europe, such as in Germany, Austria and Czech Republic, were found to be the most deadly.

The study also used the roadkill surveys to rank the bird and mammal species whose long-term survival was most threatened by roadkill.

The hazel grouse and russet ground squirrel were found to be the most at-risk of local extinction. Both are common in Europe but are classified as species of Least Concern in the International Union for Conservation of Nature’s (IUCN) Red List of Threatened Species.

The most vulnerable animals classified as Threatened by the IUCN were the red-knobbed coot, and the Balcan mole and Podolian mole.

The study revealed that the roadkill hotspots did not correlate with the areas with the highest populations of vulnerable species.

For example, house sparrows had a high roadkill rate projection (2.7 per km/yr) but were ranked 420th of 423 bird species for vulnerability. Conversely, the hazel grouse had a low predicted roadkill rate (0.2 per km/yr) but was most vulnerable of all birds studied.

The areas with the highest concentrations of vulnerable bird species were the Iberian Peninsula, Balkan Peninsula and Eastern European countries. Vulnerable mammals were concentrated in northern Spain, Italy, Austria and the Balkan Peninsula.

Dr Clara Grilo, researcher at CESAM and lead author of the study, said: “We wanted to get the big picture of which species are more roadkilled and also map the regions that can be a threat for wildlife conservation in Europe. We used modeling to estimate roadkill for the unstudied species and also to identify which species are vulnerable to local extinction due to roads.

“From a conservation perspective, we need to go beyond the quantification of roadkill by applying population models to identify which species can be vulnerable to additional loss of individuals, which will provide more accurate information to target road segments that require mitigation.”

Members of the public can contribute roadkill reports to improve studies like this one by visiting https://projectsplatter.co.uk/

Top 10 most vulnerable species

BIRDS

1 Bonasa bonasia, Hazel grouse

2 Circaetus gallicus, Short-toed snake eagle

3 Phylloscopus borealis, Artic warbler

4 Lanius nubicus, Masked shrike

5 Anthus cervinus, Red-throated pipit

6 Loxia leucoptera, Two-barred crossbill

7 Buteo rufinus, Long-legged buzzard

8 Gelochelidon nilotica, Common gull-billed tern

9 Ardeola ralloides, Squacco heron

10 Glaucidium passerinum, Eurasian pygmy-owl

MAMMALS

1 Spermophilus major, Russet ground squirrel

2 Spalax graecus, Balkan mole rat

3 Spalax zemni, Podolian mole rat

4 Spalax microphthalmos, Greater blind mole rat

5 Spalax arenarius, Sandy mole rat

6 Pygeretmus pumilio, Dwarf fat-tailed jerboa

7 Rhinolophus blasii, Blasius’ horseshoe bat

8 Rhinolophus Euryale, Mediterranean horseshoe bat

9 Sorex alpinus, Alpine shrew

10 Ellobius talpinus, Northern mole vole

#Nature

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jdenvs3000-2018-blog · 5 years

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Beginner’s Guide to Winter Birding

Okay, so first thing’s first, if you’re interested in birding in the winter, you must come prepared (and be tough as nails!). What you need: binoculars (an absolute must!), spotting scope (if you have one), camera, bird field guide (I personally recommend Sibley), field notebook or phone to keep a checklist, and lots of layers of warm clothing. Now, that you’re ready to go, you have to choose which type of birds you want to see; this can be birds you’re the most familiar with or can be birds you have less experience with and would like to gain experience. For this post, I’m just going to break it down into three categories: winter finches and allies, shorebirds and gulls, and owls.

Winter finches and allies

Some of the most colourful and cheery birds to see in the winter are the finches; their songs tend to be quite musical and upbeat, which can help raise spirits when you’re freezing outside. Some of my favourites are white-winged crossbills, purple finches, and evening grosbeaks. The best places to see purple finches and evening grosbeaks are at bird feeders, and they will come in super flocks (the most I’ve seen at one feeder was 47). Basically, if you feed them, they will come (if you live in their range of course!). Since finches and grosbeaks are attracted to feeders, you can incorporate them into a nice lunch break where you sit inside and watch them at the feeder while having hot soup or tea. Crossbills are a little bit more tricky to find, but they can be found on coniferous trees eating the pinecones (that’s what their bills are specialized for). They have this beautiful song, so you can keep an ear out while walking through a pine stand. The best place to see all of these birds (in my opinion) is Algonquin Park - you can find the finches and grosbeaks at the feeders at the Visitor Centre and the crossbills are typically found along trails or Lake Opeongo road. You can also see these birds in Guelph, but why not drag your friends to Algonquin to go birding?

Purple finch male (Haemorhous purpureus) in Algonquin Park (2018).

Evening grosbeak male (Coccothraustes vespertinus) in Algonquin Park (2018).

White-winged crossbill female (Loxia leucoptera) in Algonquin Park (2018).

Shorebirds and gulls

These are some of the hardest birds to identify, especially gulls, since they all look relatively identical. This is also where a scope can come in handy, since these birds will be sitting or flying around large lakes at far distances; the field guide is a must for these birds! My favourites to see in the winter are harlequin ducks, black-legged kittiwakes, and surf scoters. A great place to go gull-watching is Niagara Falls - the gulls tend to congregate on the river above the falls and also fly through the mist at the bottom of the falls. Harlequin ducks are beautiful sea ducks that do not normally exist in Ontario, but tend to get trapped here in the winter by weather systems - the same is true for black-legged kittiwakes, but these two birds are commonly found in the winter. Surf scoters are these weird looking sea duck that has this hump on their beak, common to all scoters. These are birds that you will be freezing for - the bitter winds from lakes can be bone-chilling, and you’ll also be standing for quite a while staring into large flocks trying to find one bird in particular.

Herring gull adult (Larus argentatus) in Niagara Falls (2018).

Owls

These are some of my favourite birds to see in the winter, even though I haven’t really been winter owling that much. The most common owl you will see during the winter is the snowy owl. You can also see some long-eared and short-eared owls if you head more south towards Niagara. Spotting snowy owls can be quite tricky! A plastic bag caught in a tree or a hump of snow in a field can look a lot like an owl - this sounds silly, but it’s incredibly true! Personally, the method that is the most effective for me is just driving around side roads that are surrounded by farm land and fields. Typically, you will find snowy owls sitting on fence posts, hydro poles, or flying and hunting for mice in fields. These birds can look quite moody and basically stare daggers at you if you stop to see them. Another important note is to really keep your distance (I’d recommend 20-40m) away from them, since owls are typically snoozing during the day and will be mobbed by nearby crows or jays if they are spotted.