The sex of a bird – whether it is male or female – is one of the most critical aspects of its biology. Males and females often behave differently, especially during the breeding season, and in many species, they have strikingly different plumages.

This episode features Dr. Hamish Spencer, an evolutionary biologist at the University of Otago in southern New Zealand. Hamish was recently in Colombia, where he was shown a bird that violated these rules.

Colombian ornithologist John Murillo had discovered a very unusual Green Honeycreeper (Chlorophanes spiza) on his farm near Manizales in Colombia and pointed it out to Hamish when he visited early in 2023. The bird exhibited aqua-blue male plumage on its right and grass-green female plumage on its left. The bird’s head showed the black hood of a typical male on the right, but the left side was mostly green.

This episode discusses this bizarre phenomenon, known as bilateral gynandromorphy. How did it affect this particular bird? How does it arise? How common is it? Which species has it been observed in?

The article reporting this find has colour photos taken by John Murillo and is available at https://journal.afonet.org/vol94/iss4/art12/

John Murillo’s video can be seen at https://figshare.com/articles/media/DSCN2268_MOV/23739894

When a pigeon comes into the house. This is a controversial episode.  In fact, I am pretty sure nobody in the nature groups that I am part of will approve of this.  In fact, they may even condemn this episode.  Because you see, it is about pigeons, which birders call flying pests. But here’s what happened and so, if you listen or watch this episode, advance apologies. 

About six months ago, a rock pigeon made a nest in my mother-in-law's balcony. This episode is about the ripple effects after that.

One day, I returned after a long trip and visited my mother-in-law who lives in a separate apartment in my building to discover that a pigeon had laid two eggs on a chair that she uses to sit on in her balcony.  My mother in law was quite delighted with this development.  She lives alone and having a living creature inhabit her home gave her a lot of pleasure.  The problem is that these feral pigeons– rock doves– are carriers of disease.

Bird Podcast is one of the Top 20 science podcasts in India per Feedspot.

Here is a special episode about how different Bangalore birding experts got into birding.

This episode is about Bhutan: carbon-negative, Buddhist and a pioneer in sustainable tourism. This tiny country, about the size of Switzerland contains 774 species.  In comparison, neighbouring India— nearly ten times the size— has just 1200 species. Here we talk to Namgay Tshering a freelance birding guide about the birds of Bhutan.  Specifically he mentions the Beautiful Nuthatch, the Blyth’s tragopan, the Himalayan Monal and others.  He talks about how Eastern and Southern Bhutan are a haven for birdwatchers, perhaps because the main cities of Paro, Thimphu and Punakha are far from these locales.  Watch this episode on Youtube for visuals of Bhutan. 

In this episode, we talk to a resident naturalist about the motmots, hummingbirds and toucanets that you can see in Costa Rica.

Delhi and its neighbourhoods, with its variety of habitats and landscapes, is remarkable for the wealth and diversity of its avifauna. It is a true haven for bird lovers, home to an astonishing array of over 470 captivating bird species. Get ready for an enchanting adventure with Sudhir Vyas's delightful book, "The Birds of the Delhi Area," which is the ultimate guide to unlocking the secrets of these feathered wonders! This book has been edited by Anita Mani under Indian Pitta- India's first imprint dedicated to birds.

With over 50 years of bird watching experience, Sudhir Vyas, a former career diplomat, possesses an intimate understanding of Delhi's avian inhabitants. His expertise shines through numerous articles and studies on ornithology in the Delhi area.  An invaluable resource for the rapidly growing community of bird watchers in Delhi and beyond, it explores the diverse avifauna of the region.  Accompanying Vyas's words are the breathtaking photographs of by a number of bird photographers, including by Amit Sharma, a passionate wildlife and bird photographer, whose images comprise the bulk of the pictures that illustrate the book and bring the birds and their varied habitats to life.

This is the first of three episodes about the bird life in Costa Rica.

This one focuses on the three-wattled bell-bird and the episode is set in the Monteverde Cloud Forest Reserve.

Listen to the bellbird on Youtube here.

Meet One Of The Loudest Birds In The World (Three-wattled Bellbird)

Thanks to these photographers for their images

https://unsplash.com/@zmachacek

https://unsplash.com/@feiffert

Thanks to Michael Brooks for this video of the bird calling

https://www.youtube.com/watch?v=Js9rqJZ_a-8&list=PPSV

Featured image from Wikimedia Commons

• Procnias_tricarunculata_-Costa_Rica_-male-8.jpg: Ryan Kozie