On this page you can find an overview of all the blog posts that I have written over the years.

  1. Did sexual selection drive the evolution of Gallopheasants?
  2. With or without gene flow? Studying speciation in the Grey-headed Bullfinch species complex
  3. More than meets the eye: How many species does the bird genus Dendrocolaptes contain?
  4. The evolution of the genomic landscape in Silvereyes does not follow theoretical predictions
  5. Black-and-white birds: The influence of climatic conditions on gull plumage
  6. A genomic perspective on the classic hybrid zone between Baltimore and Bullock’s Oriole
  7. Why do Robust Woodpecker, Lineated Woodpecker and Helmeted Woodpecker look alike?
  8. Admixture in Amazonia: Reconstructing the evolutionary history of the Pectoral Sparrow
  9. The role of hybridization in the domestication of geese
  10. Convergent evolution of immune proteins in tits, chickadees, and titmice
  11. The constrained evolutionary trajectories of White-eyes on the African mainland and its islands
  12. Why the “Red-breasted Meidum Goose” is probably not an extinct species
  13. Splitting the Long-tailed Rosefinch into a Chinese and a Siberian species
  14. How did the Ice Ages affect three Scrubwrens in the highlands of Papua New Guinea?
  15. Genomic study unveils the true identity of Brewster’s and Lawrence’s Warbler
  16. Isolated Icterids: Unraveling the evolutionary history of the Altamira Oriole
  17. The complex interplay between tRNA genes and transposable elements in bird genomes
  18. Unusually low genetic diversity in the Red-billed Tropicbird
  19. The magic of Fairywren hybrids
  20. How the Hooded Crow got its hood: A tale of two crows and a transposable element
  21. A genomic continuum from feral to wild Red Junglefowl in Singapore
  22. How did the Ground Tit get its long beak?
  23. Solving the genetic mystery of the mosaic canary
  24. Should I stay or should I go? Patterns of gene flow across land bridges in Southeast Asia
  25. Do male Hoopoes judge female quality by inspecting the color of her eggs?
  26. Solving the paradox of the great speciator on the Solomon Islands
  27. Intermediate color morphs of the Common Buzzard are most successful
  28. Misconceptions and regressions: The evolution of bird brains
  29. From the sky to the island: Flightless rail species converge on the same body plan
  30. Three bird species show how to travel between the Andes and the Atlantic Forest
  31. Mixing Motmots: A hybrid between Rufous and Amazonian Motmot in Brazil
  32. The genomics of local adaptation in Blue Tits
  33. Mitochondrial capture in the Chestnut Quail-thrush: Neutral or adaptive introgression?
  34. How many ancestral species gave rise to the domestic chicken breeds?
  35. The Great Speciator strikes again: Discovery of a Mangrove White-eye in Saudi Arabia
  36. Building bowers and phylogenies: Genomic study reconstructs the complex evolution of bowerbirds
  37. Following the Forests: How the Variable Antshrike spread around the Amazon
  38. Is prezygotic isolation more important than postzygotic isolation at the onset of speciation?
  39. A common species with a complex history: The evolutionary story of the Great Tit
  40. How and when did Frogmouths cross Wallace’s Line?
  41. Inferring introgression: Genomic study on hybridizing Darwin’s Finches highlights the importance of field observations
  42. Uncovering cryptic diversity in the lesser short-toed lark species complex
  43. Non-coding DNA drives the evolution of avian beak morphology
  44. Figuring out the origin of two Fire-eye Antbird species in the Atlantic Forest
  45. The speciation cycle of Taiga and Tundra Bean Goose
  46. Are we missing something? Exploring the diversity of white-eye species on the African mainland
  47. Blackcaps help to unravel the genetic basis of bird migration
  48. How many members of the Lesser Whitethroat complex breed in Iran?
  49. What drives avian speciation in the Amazonian floodplains?
  50. Selection on metabolism and memory in a moving Chickadee hybrid zone
  51. Surprisingly high genetic diversity in an island species: What happened to the Raso Lark?
  52. Genetic bridges: Medium ground finch functions as a conduit for gene flow between two other Darwin’s Finches
  53. The curious case of the Vaurie’s nightjar
  54. Colorful females, dull males and everything in between: the complex evolution of plumage patterns in the Pacific Robin
  55. Complicated Cotingas: Can we resolve any phylogeny by just adding more data?
  56. Loss of migration leads to speciation in the Fork-Tailed Flycatcher
  57. Do plumage patterns support the eleven subspecies of the Velazquez’s Woodpecker?
  58. Ready, set, speciate: The role of sex chromosomes in the divergence of Reunion grey white-eye morphs
  59. Crossbills show there is more to evolution than natural selection
  60. Solving the seabird paradox: How does genetic differentiation arise in highly mobile species?
  61. Splitting scimitar babblers: Genetics and morphology point to two distinct species
  62. Do rivers promote avian speciation in the subtropics?
  63. Captive-bred ducks are genetically swamping wild Mallard populations in eastern North America
  64. A suite of subfamilies: How to classify the estrildid finches?
  65. Do crows engage in extra-pair copulations to avoid hybridization?
  66. Taxonomy in flux: The story of three flatbills and a flammulated flycatcher
  67. Saving the Snowy Plover: How many conservation units should we protect?
  68. Can you deduce the activity patterns of owl species from their eye color?
  69. Black hoods or bright eyes: The evolution of plumage patterns in gulls
  70. A Caribbean connection: How thrushes conquered the world
  71. African adventures: Human-mediated hybridization between Common and Black-faced Impala
  72. Ancient DNA helps to place two extinct duck species on the Tree of Life
  73. Cryptic Crows: Genetic study uncovers a wide hybrid zone between American and Northwestern Crow
  74. Does migratory behavior affect genetic diversity in the Golden-crowned Kinglet?
  75. Phylogenetics in the genomic era: Reconstructing the evolutionary tree of rails (family Rallidae)
  76. Hybridizing hyenas and how to find them
  77. Conservation genetic in China: Comparing genetic diversity of Siberian and Sichuan Jays
  78. Figuring out the evolution of forked tails in Swallows and Swifts
  79. Choosy Snowcocks: How habitat preference can affect genetic population structure
  80. Woodcreeper species continue to exchange DNA until 2.5 million years after divergence
  81. Drum roll, please! The evolution of rhythm in Woodpeckers
  82. Did the New Zealand Rockwren ever occur on North Island?
  83. Let’s not hop to conclusions: Delineating species in the Rockhopper Penguin complex
  84. The peculiar genomes of Falcons
  85. Population Genomics of Mangrove Warblers: Looking for candidate genes in Costa Rica
  86. How mountains, rivers and hybridization drove the evolution of the Blue-crowned Manakin
  87. Shake your tail feather! Courtship displays and genetic analyses uncover extensive hybridization between Allen’s and Rufous Hummingbird
  88. Are there still “pure” Hawaiian Ducks?
  89. Beyond genetics: How different are Kentish and White-faced Plover?
  90. Different migration strategies contribute to reproductive isolation between Barn Swallow subspecies
  91. Babblers provide evidence for “speciation cycles” in the Himalayan-Hengduan Mountains
  92. Are there really two species of red panda?
  93. Ecological speciation in the saltmarshes
  94. Observations confirm intergeneric hybridization between Common Black Hawk and Red-Shouldered Hawk
  95. Choosing between Cerrado and Chaco: Which corridor connected the Andean and Atlantic forest populations of the Buff-browed Foliage Gleaner?
  96. The variable beak of the finch: How hybridization increases variation in beak morphology
  97. Contemplating Kingfishers in Indonesia: The story of a “Great Speciator”
  98. Isolation by distance, adaptation or environment: What explains genetic patterns in the Red-crowned Ant-tanager?
  99. Genetic study uncovers viability selection in the Imperial Eagle
  100. Reader’s Hybrids: Ducks and Geese
  101. Genomics on the Galapagos: Exploring the genetic diversity of Darwin’s Finches and their relatives
  102. A genetic model for puntuated equilibria
  103. Drawing lines between larks: How many species of Horned Lark are there?
  104. Genomic data uncover subtle population structure in the White-chinned Petrel
  105. Where did the Ecuadorian Creole Chicken come from?
  106. A mosaic hybrid zone between Scissor-tailed Flycatcher and Western Kingbird
  107. Explaining the pantropical distribution of kingfishers, bee-eaters, rollers, motmots, and todies
  108. The genomics of being a raptor
  109. A taxonomic riddle: Where does the extinct Canary Islands Oystercatcher fit in?
  110. A lesson in cladistics with the Plain-brown Woodcreeper
  111. Unraveling the origin of the Visorbearers
  112. White-throated Sparrows influence gene expression in their offspring
  113. Taking advantage of hybridization to find a migration gene in warblers
  114. The crazy sex-chromosomes of the Larks
  115. Islands in the Andes: Are populations of the Plumbeous Sierra-finch in Ecuador genetically distinct?
  116. Multispecies hybridization among Thrushes (genus Catharus)
  117. Cultural evolution contributes to speciation in Crossbills
  118. Are crows on islands experiencing a mutational meltdown?
  119. Hybrid Honeyeaters in eastern and western Australia
  120. Sparrows illustrate the possible outcomes of hybridization: from a hybrid species to a mosaic hybrid zone
  121. D-statistics for Dummies: A simple test for introgression
  122. The evolution of feathers: How sexual selection set the stage for natural selection
  123. Promiscuous Pitohuis: Exchange of “toxicity genes” between poisonous birds?
  124. A hybrid in the making? Attempted mating between Sanderling and Broad-billed Sandpiper
  125. Pinning down the Shrike phylogeny
  126. Testing for gene flow between Torrent Ducks in Peru and Argentina
  127. Separating Sparrows: Species limits in the striped-sparrows (genus Rhynchospiza)
  128. Ecological speciation in the White-tipped Plantcutter
  129. How far did the hybrid zone between Hermit Warbler and Townsend’s Warbler move?
  130. The Caracara Conundrum: Where does the extinct Creighton’s Caracara fit in?
  131. North-south divergence within Godlewski’s Bunting coincides with the uplift of the Tibetan Plateau
  132. Analyses of museum specimens uncover hybrid jays in Brazil
  133. Asian Leaf Warbler might carry mitochondrial DNA of an extinct species
  134. The Smell of Speciation: Chickadees prefer the scent of their own species
  135. Is there a hybrid zone between subspecies of the Scarlet Macaw?
  136. Classifying Corvids: Peculiar phylogeographic patterns in the crow family
  137. More than meets the eye: Scientists discover several cryptic storm-petrel species
  138. How many times did Steamer Ducks lose the ability to fly?
  139. Genetic study reveals how four different sparrow species adapted to life in the salt marshes
  140. Adventures in the Andes: The Tantalizing Tale of the Torrent Duck
  141. These two White-eye species should be hybridizing, but they don’t…
  142. Genetic study uncovers a deep split within the Hooded Pitta species complex
  143. High levels of gene flow between different populations of North American Scoters
  144. Central-American Wood-partridges are older than expected
  145. Off-color Orioles: Hybrids or abnormal plumage patterns?
  146. Pecking in the Pyrenees: No gene flow across a hybrid zone between Eurasian and Iberian Green Woodpecker
  147. Back from the brink of extinction: The remarkable recovery of the Crested Ibis
  148. How many species of Red-shouldered Hawk are there?
  149. It takes two: The evolution of duets in New World warblers
  150. A philosopher claims species do not exist. He is wrong.
  151. Can Mandarin Ducks hybridize with other duck species?
  152. The social lives of quails: Why do California and Gambel’s quail hybridize?
  153. What’s for dinner? Rapid evolution of non-native frugivores on O’ahu
  154. Genetic study of the Mallard complex reveals extensive hybridization with little recent gene flow
  155. A Brazilian Brain-teaser: How did the hybrid zone between Rufous-capped and Bahia Spinetail form?
  156. Introducing another hybrid bird species: the Salvin’s Prion
  157. Spooky introgression in the African jungle: Bonobos hybridized with a “ghost” ape
  158. The more the merrier? My review on multispecies hybridization in birds
  159. Do grazing waterbirds surf the green wave?
  160. Hybridization with escaped falconry birds and nest poaching threaten Barbary Falcons on the Canary Islands
  161. The genetic legacy of population decline and recovery in the Red-cockaded Woodpecker
  162. Honey, I resolved the Meliphaga phylogeny!
  163. How do hybrid Tree Finches cope with parasites?
  164. Does hybridization between Nuttall’s and Ladder-backed Woodpecker result in gene flow?
  165. Genomic analyses point to speciation with gene flow in the Northern Saw-whet Owl
  166. What drives plumage evolution in woodpeckers?
  167. Hybridization and Tinkering: High levels of gene flow between Yellow-fronted and Red-fronted Tinkerbird
  168. East or West? Different populations of Red-necked Phalaropes use distinct migration routes
  169. Island formation drove penguin evolution
  170. The head of the finch: A small genetic region controls colour morphs in the Gouldian Finch
  171. Cartilaginous crosses: A short overview of hybridization in sharks and rays
  172. The evolution of bird coloration: Exploring the complex interplay between natural and sexual selection
  173. How to turn a Carrion Crow into a Hooded Crow (and vice versa)?
  174. Breaking Barriers: Low levels of gene flow among subspecies of the Grey Shrike-thrush
  175. Is the Great White Heron a distinct species?
  176. Species in the making: Genomic analyses reveal incipient speciation in the Ground Tit
  177. Museum specimens reveal phenotypic introgression in a Scrub-Jay contact zone [Guest Post by Devon DeRaad]
  178. The Niches of the Nuthatch: How local adaptation and competition have shaped the present-day distribution of the Eurasian Nuthatch
  179. An Egyptian Goose is not a goose
  180. Combinatorial Speciation: Reassembling of old genetic variation facilitates rapid speciation and adaptive radiation
  181. Mastering Malaria: The Hawaiian ‘Amakihi uses a variety of genes to combat avian malaria
  182. A Mitochondrial Mystery: Why are there two deeply divergent lineages in the Savannah Sparrow?
  183. Are Chinese indigenous chicken breeds genetically “polluted” by commercial broilers?
  184. Barking up the wrong species tree: How gene flow shaped canine evolution
  185. Tracing the origins of the giant raptors on New Zealand
  186. Chaffinches on the Canary Islands: A new subspecies on Gran Canaria
  187. More than one way: How the open vegetation corridor influences the evolution of South American birds
  188. Scrutinizing a Superspecies: Patterns of Gene Flow among Common, Long-legged and Upland Buzzard
  189. The genetic recipe for a bird-of-paradise radiation
  190. A Puzzle of Primates: Disentangling the complex evolutionary history of Baboons
  191. Hybrids all the way down: Interbreeding musk turtles in Alabama
  192. Are Mallards driving Black Ducks to genetic extinction?
  193. Which genes contribute to speciation and adaptation in grouse?
  194. Hybrid speciation in yeast: How one hybrid species gave rise to another one
  195. Has climate change moved the hybrid zone between Red-naped and Red-Breasted Sapsucker?
  196. Adaptation in Parrotbills fueled by standing genetic variation
  197. First report of hybridization in millipedes
  198. Can divergence in sperm morphology reduce hybridization in nightingales?
  199. Protecting Penguins: Exploring population dynamics in several penguin species
  200. Monophyletic Manakins? Not according to mtDNA…
  201. Crossing the Atlantic: How the Glossy Ibis colonized North America and hybridized with the native White-faced Ibis
  202. Hybridization with Painted Stork threatens the already endangered Milky Stork
  203. Doing it in the Dark: Hybridization in Bats
  204. A Little Brown Job: Unraveling the Chiffchaff complex
  205. Scientific Sherlocks: The Case of the Imperial Pheasant
  206. Why are more sex-linked genes flowing from Thrush into Common Nightingale? Exploring the faster Z-effect in birds
  207. Who runs the world? Hybrid zone dynamics in a bird species where females compete for males
  208. Hybridization contributes to rapid and repeated evolution of cave fish
  209. Are Snow Bunting and McKay’s Bunting different species?
  210. How healthy are juvenile eagle hybrids?
  211. Why do different populations of the Greenish Warbler sing other songs?
  212. Unraveling the history (or histories?) of the Red-bellied Woodpecker
  213. Flipping DNA: The role of inversions in avian evolution
  214. φοβερο! Hybrid dolphins in the Greek Seas
  215. Genetic population structure of the Black-billed Gull, with a hint of Red-billed Gull
  216. A hybrid between Black-browed Tit and Sooty Tit
  217. Looks can be deceiving: Parallel evolution of plumage coloration in wheatears
  218. Hybridization leads to emergence of a new sex chromosome
  219. A hybrid zone between subspecies of the Common Ringer Plover?
  220. How many hybrid bird species are there?
  221. Going with the flow: Gene flow from Chinese Spot-billed Ducks into Mallards
  222. Studying sperm success: A possible reproductive barrier between subspecies of the Long-tailed Finch
  223. Exploring the genomic landscape of wood-warblers
  224. Newly discovered hybrid zone between Colima and Virginia’s Warbler in Texas
  225. What selection pressure is acting on hybrids between Audubon’s and Myrtle Warbler?
  226. Crisscrossing Europe: The genetics of crossbills in the western Palearctic
  227. Are yellow-rumped warbler hybrids more susceptible to parasite infections?
  228. Mixing in the Marshes: King rail and clapper rail hybridize in Virginia
  229. Looking for genetic differences between Araripe and helmeted manakins in Brazil
  230. Salty Genes: Hybridization between saltmarsh and Nelson’s sparrow results in exchange of adaptive genes
  231. Where did all these fish come from?! A genomic perspective on the explosive diversification of cichlids
  232. The eagle has landed: Tracking the migration of hybrids between lesser and greater spotted eagles
  233. Wall lizards form hybrid swarms in German cities
  234. Pinpointing the position of a parrot hybrid zone in eastern Australia
  235. Ancient DNA study sheds light on domestication history of geese in Russia
  236. Got your mtDNA! Mitochondrial capture in Amazonian Jacamars
  237. Fascinating Finches: Patterns of Gene Flow in South American Siskins
  238. On the Origin of Pigeon Plumage Patterns: A Role for Hybridization
  239. Something smells fishy: Exchange of olfactory genes between cichlids
  240. High altitude hybrids: the story of Ruddy Ducks in Colombia
  241. Promiscuous pathogens: What if disease-causing fungi hybridize?
  242. It’s complicated: Hybrid hummingbirds in Mexico
  243. Knock, Knock! Who is there? Woodpeckers, but how many species?
  244. Glacial cycles culminate in hybridization events between North American Stoat populations
  245. Why are seabird hybrids so rare?
  246. Probing the Puzzling Plumage Patterns of White Wagtails
  247. Glorious Bustards: How many species of great bustard are there?
  248. Mind the gaps: The incompleteness of complete avian genome assemblies
  249. The Flight of the Condor: How the Andes shapes patterns of gene flow
  250. Readers’ Hybrids: A lot of hybrid parrots!
  251. Let me take a selfie: Scientists discover hybridization in a selfing fish
  252. Several hybridization events shaped the evolution of Neotropical flycatchers (genus Elaenia)
  253. Coal tits exchange genes in central Europe
  254. On avian hybrids in the low countries
  255. Holy Cow! Hybridization Facilitated Domestication and Adaptation of Cows
  256. Exploring gene tree discordance with lizards
  257. Are hybrids between capuchino seedeaters fertile?
  258. Hybridizing hares: How the snowshoe hare got its brown coat
  259. How trees can drive fish speciation in the Amazon
  260. Genetic Analyses confirm Hybridization in a Threatened Tern Species
  261. Do land bridges facilitate gene flow between island populations?
  262. Coloring outside species boundaries: A ‘super’-cool example of adaptive introgression in butterflies
  263. Why Nightingales Don’t Mix: Interspecific Competition and Sterile Females
  264. What keeps bird species distinct in Amazonian hybrid zones?
  265. A Dutch mystery: Can you guess which duck species have hybridized?
  266. What Happens When Two Badger Species Meet in Russia?
  267. Dumb, dumber, hybrids? Chickadee hybrids show lower intelligence
  268. The hybrid genome of the Italian Sparrow: endless genetic variation?
  269. Reader’s Hybrids: A Canada Goose x Greylag Goose in the UK
  270. Don’t forget the hybrids! Antbird study shows that not taking into account hybridization leads to the wrong species tree
  271. Are Wagtail subspecies supported by genetic data?
  272. Sorry I’m late. Less hybrid Flycatchers due to climate-driven changes in timing of breeding?
  273. It’s not a tree, but a network! New insights into the evolution of baleen whales
  274. Two new hybrids for the checklist: an Australian Ibis and a South-American Brush Finch
  275. The subspecies of the White-collared Seedeater complex are not even closely related
  276. There used to be two Black Swan species on New-Zealand
  277. Hybridizing Flame-rumped Tanagers clearly show that mixing red with yellow gives you orange
  278. Mixing mammoths and blending bears: DNA from fossils reveals ancient hybridization
  279. Bergmann’s Rule in the Andes: The Case of the Line-cheeked Spinetail
  280. Wandering Wekas: The Genetic Structure of a Flightless New Zealand Bird
  281. Hybrid zones help to unravel the genetics of bird coloration
  282. Disentangling the Evolutionary History of Towhees in Mexico
  283. OMG (Owls, Migration and Genetics)! A Heteropatric Speciation Model for Northern Saw-whet Owls
  284. From the Rainforest to the Savannah: Ecological Speciation in the Little Greenbul?
  285. Hybridization as the Engine of Adaptive Radiation
  286. Hybrid Bird Species: A Big Bird on the Galapagos Islands and a Small Manakin in the Amazon Basin
  287. Trouble with the Tinkerbirds: Different subspecies sing the same song
  288. A Reunion of Three Color Morphs on Reunion
  289. Cheating in the Czech Republic: Ducks Putting Their Eggs in the Wrong Basket
  290. A Lesson in Cline Theory with Some Hybridizing Barn Swallows
  291. Different, but the same: How Amazonian rivers and African deserts drive bird speciation
  292. Avian hybridization in Asia: Venturing into the (relatively) unknown
  293. You Go, Girl! Females determine direction of gene flow in Tree Finches
  294. Hybridization in Birds: The Trilogy
  295. Watch Your Head: Why White Wagtails Won’t Mix
  296. Looking for Migration Genes in the Willow Warbler Genome
  297. Promiscuous Petrels: Genetic Study Reveals Gene Flow on a Global Scale
  298. Throwback Thursday: Six Years with a Brewster’s Warbler
  299. Becoming Black: The Origins of Melanic Monarcha Flycatchers
  300. Che Figata! New studies on the ecology and evolution of a hybrid species, the Italian Sparrow
  301. Splitting Buntings in the Sahara
  302. More Species Than Meets the Eye: A Genetic Look at the Red-eyed Vireo Complex
  303. Mottled Mallards on the Western Gulf Coast
  304. Hybridization in Primates (and yes, that includes you!)
  305. Arctic Sharks: A Story of Ice-olation and Hybridization
  306. Hybrid Owls: Californian Contacts and Mediterranean Migrants
  307. The Beak of the Bullfinch: Remains of an Extinct Bird Species Found on the Azores
  308. Two Crow Hybrid Zones for the Price of One!
  309. A Northern and a Southern Perspective on Hybrids between Golden-winged and Blue-winged Warbler
  310. The Ecological Succession Story of Hybridizing Bluebirds
  311. Hybrid Geese: A Trilogy of Papers
  312. Throwback Thursday: Observations of Red-shafted and Yellow-shafted Flickers in a 1893 letter to Science
  313. Throwback Thursday: Strange Swallows from 1902
  314. Some Hybrid Woodpeckers from North and South America
  315. Throwback Thursday: A Hybrid Quail That Tried to Phone Home
  316. The Superb Bird-of-Paradise and the ‘Dancing Species Concept’
  317. The Songs of Tree Finches (and their hybrids)
  318. Hybrid Geese in Finnish Hunting Bags
  319. Hybridizing Buntings in Iran
  320. Rawnsley’s Bowerdbird: Another species that turns out to be a hybrid
  321. Separating the wheat from the (chiff)chaff
  322. Interspecific Spooning
  323. It’s not a new species, it’s a hybrid!
  324. Conservation of the Mottled Duck: Multiple Populations and a Feral Threat
  325. A New Year and some new papers
  326. Spring Updates, including artistic Pheasants and Promiscuous Petrels
  327. An Early Christmas Present: Pictures and Papers
  328. Amazonian Hybrids
  329. Recent Updates: Flycatchers, Birds-of-Paradise, Eagles and Malagasy Passerines
  330. Morphology Insufficient to Detect Hybrid Sparrows
  331. Giant Petrel Hybrids are Fertile
  332. Thrush Migration and Speciation