The vocalisations include short high "pli", and "piieh" and "tshir" calls resembling those of the linnet and the house martin respectively.
en.wikipedia.org Bats, house martins and swifts, meanwhile, all eat thousands of insects a day, many of them pests such as aphids and midges.
www.ft.com Among the wildlife species found there are butterflies, dragonflies, kestrels, swallows and house martins.
en.wikipedia.org Despite the general aggressiveness of the martin, it tolerates sympatric common house martins, perhaps because the large numbers of that highly colonial species provide an early warning of predators.
en.wikipedia.org Its speed and aerobatic skills enable it to take swallows and even swifts on the wing, and barn swallows or house martins have a characteristic hobby alarm call.
en.wikipedia.org