What happens when a bird dies

posted in: Miscellaneous, Videography | 3

On the morning of 15th October, I came across a dead Red-whiskered Bulbul (Pycnonotus jocosus) lying on the concrete walkway near its roosting trees. Not sure what caused its death. There were already a few ants on the body (above).

That evening I removed the dead bird to my garden and left it on the grass to document the stages of decomposition. During the day, I left the dead bird exposed to the sun and rain. At night I covered it with a pot so that stray cats or even Common Palm Civets (Paradoxurus hermaphroditus) do not remove the dead bulbul.

The next day there were ants crawling over the body, especially around the eyes (video below). A number of Flesh Flies (Family: Sarcophagidae) appeared, no doubt attracted by the smell of rotting flesh. According to Wikipedia, Flesh Flies are “ovoviviparous, opportunistically depositing hatched or hatching maggots instead of eggs on carrion, dung, decaying material, or open wounds of mammals, hence their common name. …The adults mostly feed on fluids from animal bodies…”

On the third day, the eyes had totally disappeared, leaving only the sockets (video below). The ants did a good job removing all the tissues. These are the most vulnerable parts of the body, being not covered with feathers or scales. The smell of rotting flesh was strong, attracting more flies. Some of the flies were moving around the eyes as the ants had made an opening into the rotting body. A fly was seen probing among the loosened neck feathers.

By the fourth day the feathers became loosened from the body as the tissues had by now somewhat decomposed. Any slight movements caused the feathers to detach from the dead body. A number of white larvae were seen moving away from different parts of the dead body into the ground below, most likely to pupate (below).

On the afternoon of the seventh day the head disappeared, most likely taken by a myna (below).

BulbulRW-dead 221017b-day 7.JPG

Most of the body disappeared on the eighth night after I forgot to cover the dead bird that night (below).

BulbulRW-dead 231017-d8

There were some rib bones left among the feathers the next morning but these too soon disappeared, leaving just a mess of feathers (below).

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And finally… see below.

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An earlier posts on the Yellow-vented Bulbul (Pycnonotus goiavier) and another that you may be interested in.

YC Wee
Singapore
17th October 2017

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3 Responses

  1. Interesting documentation YC! How and why did you come to the conclusion that “the head disappeared, most likely taken by a myna”?

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  2. S. Devasahayam

    Generally, we don’t see bird corpses in urban environments probably because of the presence of a large number of scavenging cats, dogs and rats and also opportunistic carrion-eating bird species such as crows which quickly consume the remains of dead birds. Sick and aged birds also become easier prey for predatory birds and animals and more easily caught and consumed even before they naturally die. Natural decomposition may be relatively rare in nature especially in urban environments.

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  3. To Am – Mynas are always around in my garden. They are scavengers. Cats are rarely seen. And thanks Devasahayam for the note.

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