Garden News

Juliet's Jottings: Common house martin

WJuliets Jottings roundallildlife enthusiast and resident volunteer at Exbury, Juliet, goes into detail about the Common house martin, who have a large colony in Exbury's water tower.

The Water Tower

The water tower at Exbury plays host to a colony of Common house martins, where their nests are tucked up under the eaves at the top of the tower. The colony varies in size from year to year as populations are greatly affected by the weather.

House martin flying | Exbury Gardens | New Forest, Hampshire

Flying house martin

House martin nests at Exbury water tower | Exbury Gardens | New Forest, Hampshire

Exbury's water tower, which is still in operation

The nests are made from mud, which the birds collect when they first arrive in spring, patching up old structures from the previous season, or starting again from scratch. Three of the four faces of the tower (south, east and west) are used, and the nests are built between the protruding roof beams. Each space can accommodate 2 nests, so a total of 44 on each face would be possible.

House martin chicks in nest | Exbury Gardens | New Forest, Hampshire House martin nests on water tower | Exbury Gardens | New Forest, Hampshire

House martin nests in roof beams

Over the past few years there have been about 16 occupied nests on each of the three faces of the tower; this year there are 46 in total with a further 6 occupied by House Sparrows. Most colonies consist of four to five nests, so Exbury’s colony is an important one. House Martins can raise up to 3 broods in a good year.

Great weather conditions for Common house martins

The best conditions for house martins require rain (for providing wet mud) and warmth, for good quantities of insects. While not much can be done about the weather conditions people can help martins (especially in a dry year) by providing a wet muddy area where they can collect material for their nests. Artificial boxes are also available and work best if you coat the entrance hole with mud. They are not long-lived birds, most breeding for only one season.

House martin feeding | Exbury Gardens | New Forest, Hampshire

Common house martins feeding on the Exbury estate

Identifying Common house martins

You can see the martins from quite a distance as they circle high around the tower, catching insects before swooping down into their nests. They are similar in appearance to swallows, but with shorter tails and gleaming white rumps. They will migrate south to Africa in September, though some stay around longer.

House martin perching on ledge | Exbury Gardens | New Forest, Hampshire

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‘We recently had some friends from London to visit and were looking for something to entertain our young children for the day. We decided to give Exbury Gardens a try and I thought it was wonderful. We had Sunday lunch in the restaurant and the food was far superior to other local attractions so compliments to the chef. Walking through the gardens was beautiful with lots of little pathways to explore. I have lived in the Romsey area for many years and always thought Exbury was a little out of the way but it only took me 20 minutes from the motorway. We will definitely be a regular visitor from now on.’

Philip Moulds, New Forest

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