Rhodope Mountains welcomed 76 griffon vultures chicks this spring

17 May 2022

Тhis spring 76 griffon vulture chicks have so far hatched in the Rhodope Mountains rewilding area in Bulgaria. Vulture experts from the Bulgarian Society for the Protection of Birds (BSPB), local rewilding partner, visited all the nesting sites in the eastern part of the Rhodopes Mountains in mid-May to conduct the count.

Griffon vulture nest with chick. Image: Dobromir Dobrev/BSPB

With 51 chicks hatching in 2016, this year’s result continues the positive growth witnessed in recent years. A total of 111 occupied territories were registered and the number of nesting pairs is a record compared to previous years in the Rhodopes – 101. For comparison, in 2021 their number was 88. This encouraging figure continues the upward trend in numbers experienced in recent years.

“An interesting fact during the observations was that quite a few couples started breeding again,” said Dobromir Dobrev from BSPB. Experts attribute this to the early incubating period this year (late December 2021 and early January 2022) and the sharp and long-lasting cold weather in March.

As part of the monitoring scheme, the nests of some of the more than 40 marked griffon vultures, some of which also carry GPS transmitters, were identified. Four of these vultures successfully hatched their young, while one bird with a GPS transmitter failed to raise offspring.

Image: Dobromir Dobrev/BSPB

Griffon vultures are known to be caring parents, with both partners changing position while hatching the egg and raising their chick. During hot summer days, each parent can spend hours with extended wings, shading their offspring.

Vulture chicks typically hatch at the end of March and early April. They are then raised by their parents for nearly four months until they are ready to fly, taking to the air for the first time around 140 days after birth. By the middle of summer, the young vultures typically weigh about seven to eight kilogrammes; while they are not quite as heavy as their parents, they are the same size and have all their feathers (although the colouring in juvenile vultures is different to adult birds).

The activities for monitoring, research and protection of the Griffon Vulture and the Black Vulture in the Rhodopes are carried out in partnership with Rewilding Rhodopes and Rewilding Europe.

  • This field is for validation purposes and should be left unchanged.