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The barn swallow will mob intruders such as cats or accipiters that venture too close to their nest, often flying very close to the threat. [60] Adult barn swallows have few predators, but some are taken by accipiters, falcons, and owls. Brood parasitism by cowbirds in North America or cuckoos in Eurasia is rare. [6] [37]
The wasps, bees, and ants together make up the suborder (and clade) Apocrita, characterized by a constriction between the first and second abdominal segments called a wasp-waist , also involving the fusion of the first abdominal segment to the thorax. Also, the larvae of all Apocrita lack legs, prolegs, or ocelli.
An artificial purple martin nesting colony The barn swallow is the national bird of Estonia. [48] They also are one of the most depicted birds on postage stamps around the world. [49] [50] [51] Swallows coexist well with humans because of their beneficial role as insect eaters, and some species have readily adapted to nesting in and around ...
For many species, the dominant prey item are stinging members of the order Hymenoptera, namely wasps and bees. In a survey of 20 studies, the proportion of the diet made up by bees and wasps varied from 20% to 96%, with the average being 70%. Of these honeybees can comprise a large part of the diet, as much as 89% of the overall intake.
The superfamily Apoidea is a major group within the Hymenoptera, which includes two traditionally recognized lineages, the "sphecoid" wasps, and the bees.Molecular phylogeny demonstrates that the bees arose from within the traditional "Crabronidae", so that grouping is paraphyletic, and this has led to a reclassification to produce monophyletic families.
The development of insect mouthparts from the primitive chewing mouthparts of a grasshopper in the centre (A), to the lapping type (B) of a bee, the siphoning type (C) of a butterfly and the sucking type (D) of a female mosquito.
The cliff swallow or American cliff swallow (Petrochelidon pyrrhonota) is a member of the passerine bird family Hirundinidae, the swallows and martins. [2] The generic name Petrochelidon is derived from the Ancient Greek petros meaning "stone" and khelidon (χελιδών) "swallow", and the specific name pyrrhonota comes from purrhos meaning "flame-coloured" and -notos "-backed".
Pompilidae, Tachypompilus ignitus, a typical spider-hunting wasp, has paralysed a female Huntsman spider, and is dragging it up a wall to the intended shelter Sphecidae, Ammophilinae, Eremnophila aureonotata transporting a paralysed prominent caterpillar to the nest she has excavated Katydid paralysed by a Sphecid wasp, and left outside the tunnel while the wasp performs a final inspection of ...