Chough report: August 2021

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Just in case their calls were not loud enough. Photo by Liz Corry.

By Liz Corry

Breeding season roundup

Don’t let the sound of a begging youngster fool you. The 2021 chicks are now fully independent. They just like to try their hand (or wing) once in a while with their parents.

Four youngsters have survived. This is a disappointing number although four is better than none. Thankfully, each from a different family which helps a little to spread the genetics around. Speaking of which, their DNA sexing results came in at the start of August. We have one male and three females. They all have names now too:

Rocky, breaking gender conformity with his bright pink leg ring, is the offspring of Dusty and Chickay.

Rémi, as reported last month, is wild-hatched Minty and Rey‘s first chick. She might be a St Ouen parishioner, but certainly isn’t seen as an outsider by the St John residents. 

Wally Jnr. shares a lot of characteristics with her mother Wally when she was a fledgling at the aviary. There may have been a Kevin Jnr. but we never managed to sample the second chick before it perished.

Monvie is Bo and Flieur‘s girl who sports a mauve over yellow ring. Her name is taken from the Jèrriais greeting Man vyi meaning my old mate/friend (if addressing a woman it is Ma vielle). Its pronounced a little like you are saying ‘mauvey’ which helps to remember her leg ring colour. Learn more about the language at L’Office du Jèrriais.

Sadly, but not surprisingly, the body of the missing fifth chick was found by Ronez Quarry staff on the 16th. We ringed it on 30th June so we knew it was Dusty’s and now know it was male. Judging from the state of the body he had died when we first reported it absent from the feed.

Two breeding pairs at Sorel resting in the rocky shade. Photo by Liz Corry.

Not all of the breeding pairs survived the season. We lost a male resulting in a ‘divorce’ of another pair and the re-joining of old flames. It also looks like we have lost the female who roosted and tried building a nest in Trinity. She has not been seen anywhere since early summer. 

All being well, we will have two new pairings attempt to nest in 2022 bringing it to eleven pairs. The same as in 2021 despite our losses.

West is best

View of Grosnez with the other Channel Islands on the horizon. Photo by Liz Corry.

The choughs still preferred to hang out on the north west coast in August. Who could blame them with the views.

Cliffs from Grosnez to Plémont are frequently visited by choughs. Photo by Liz Corry.

Not to mention the ‘playground’ that is Les Landes with the racecourse, stables, paddocks, rooftops, and scattered WW2 German-made structures.

As long as they keep out of the way of the occasional model aircraft and, more permanent, resident peregrines!

This peregrine at Grosnez might be more familiar with choughs than I would like. Photo by Liz Corry.

Food for thought

From March to July this year we had a student placement working on the project. Riccardo rose to the challenge of re-establishing our breeding colony of mealworms for the supplemental feed.

We have never really had enough continuity and/or success to fully rely on in-house production. We buy in 1.5kg-2kg of mealworms per week from the UK to supplement the choughs’ diet. We get a discount since it comes with the bulk order for Jersey Zoo’s residents. Yet this still equates to hundreds of pounds a year.

Thanks to Riccardo’s efforts we might be making a breakthrough. After a month of breeding we have produced about 500g of mealworms. Not enough to cancel the UK order, but it should keep our costs down.

There is potential to expand the operation…providing a certain DIY store continues to stock our ‘high-tech’ housing facility aka drawers.

Mealworm breeding setup for the supplemental feed. Photo by Liz Corry.

It’s a delicate balance of temperature, humidity, and the right amount of nutrients appropriate for each of the four life stages. Fingers crossed; we can continue Riccardo’s good work now he has returned home to Italy.

Next time you see an advert for ITV’s I’m a Celebrity….just think about the effort and expense that goes into raising mealworms. And then the waste!

102 thoughts on “Chough report: August 2021”

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