Andrena agilissima | |
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Andrena agilissima - Female | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Andrenidae |
Genus: | Andrena |
Species: | A. agilissima |
Binomial name | |
Andrena agilissima (Scopoli, 1770) | |
Andrena agilissima is a species of mining bee. They are present in most of Europe, the Near East and North Africa and can be found from April through July. Andrena agilissima is an oligolectic species, feeding only on the pollen of a few genera of Cruciferous vegetables (Brassicaceae species, such as Brassica napus , Brassica rapa , Raphanus raphanistrum , Barbarea vulgaris and Sinapis species).
A. agilissima is a member of the order Hymenoptera, which includes wasps, bees, and ants. It is in the family Andrenidae, and the subfamily Andreninae. [1] The genus Andrena is one of the largest genus of bees and comprises the sand or solitary mining bees. [2] It was first listed under the Apis genera, [3] but in 1775, Fabricus described this genus along with 14 other species. [2] Most Andrena bees are solitary and a few are communal. [4]
A. agilissima is an oligolectic bee, meaning that they collect pollen from only a few flowering plants. The plants that A. agilissima collects from belong to the family the Brassicaceae, which is usually wild radish and wild mustard. It has been shown that this species has a slight preference for the wild radish plant. The females nest on earth walls and collect pollen and nectar to feed the nest and is a pre-social springtime species. They are not known to go far from the nest, but they have been seen to forage about 300 meters away from their nesting site. There is a heightened amount of activity on foraging the wild radish flowers from 11:00 am to 1:00 pm. [1]
The adults grow up to 13–15 millimetres (0.51–0.59 in) long, with females slightly larger than males. They have a shiny black body, with tufts of white velvety hairs on the facial fovea, on either side of the thorax, on the last abdominal tergites and on the femora of the third pair of legs. The wings have bluish reflections. [1]
Andrena agilissima is a southern and central European species of mining bee, recognizable by its bluish color, which is found from the Netherlands and Poland in the north south through the islands of the Mediterranean to North Africa, where it is widespread, and as far east as the former Czechoslovakia, it is absent from Great Britain but does occur on the Channel Islands. [5] It is a typical hollow way bee. A. agilissima needs a vertical surface to nest on and it typically feeds on flowers of plants in the mustard family for food. In Southern Germany, it collects its pollen from the wild mustard plant ( Sinapis arvensis ). This plant does not grow on vertical surfaces, but instead on fields. Therefore, the only way A. agilissima can forage on this plant is when it close to an area that it can use as a nesting site. Due to the changing agricultural landscape of many places, there have been fewer A. agilissima. It is now rare to find large nest aggregations, which also impacts its cuckoo bee Nomada metalthoracica. The cuckoo bee lays its eggs in the host nest. In south-west Germany, it has been attempted to change the way fields are ploughed and planted so that the bees can feed on these wild mustard plants. This has caused for A. agilissima to start to form meta populations, or a collection of smaller local populations that have local extinctions, colonizations, and sometimes dispersal between the populations. A. agilissima - like Osmia brevicornis - also feeds on Brassicaceae (mustard plants). [6] There is a huge aggregation of this bee in Tuscany, Italy on an earth wall 2.5 m high and 6 m wide. [4]
The males search for virgin females while the females are collecting pollen from flowers. Bees in the genus Andrena are receptive to mating soon after leaving the nest as a mature bee, but are not receptive to male attention some time afterwards. Females mate only once. This bee is a communal bee where they are about 5-50 females sharing a nest entrance. It is found that most of the females have already mated before they permanently leave the nest. This is different from other bees in the genus which are usually solitary bees. Mating in the nest typically happens at the beginning of spring and mating at flowers happens at the end of the flight season. Being farther from the nest and mating will help lower the chance of inbreeding. [4]
The males do not show discrete size dimorphism unlike other bees and all are able to fly. The females are bigger than the males with a slightly larger head size. [4] There is no correlation of how big the female bee is compared to the amount of pollen that is being transferred. The carrying capacity is about 6.3 to 37.5% of its own body weight. [7]
At the beginning of the spring season, the females start digging through their underground cells to collect pollen and nectar. The pollen that is collected is on the hind tibia, a large pollen-carrying brush, the hind femora, basket-like structure, and the trochanter, another basket called the floccus. The nectar is carried internally. Nectar load is increased in the afternoon but the amount of pollen per day does not change significantly. [7]
There is a sex ratio bias in A. agilissima, skewed towards having more females than males. This may be due to local mate competition which means that males essentially devalue each other by competing for the same females as mates. This is only really true for mating within the tunnels before emergence where they are closer to their nest and not as visible compared to when there is mating at flowers away from the nest. [4]
There is no aggression when a bee finds her tunnel being temporarily used by another female that is getting to her nest. They are not seen to fight when there are other females waiting to use a tunnel while another is using it. [8] Since this is a communal bee and not a social bee, there is also no overlap of generations and not much cooperation among the reproducing females. [4]
A. agilissima is a communal bee that digs tunnels where the females stay. Many different bees use these tunnels instead of one bee per tunnel. This is also the place where males will go to have pre-emergence mating with the females. Over the years, the tunnels that the females create eventually will criss-cross more and more and the tunnels will start to interconnect. Even though there is sharing of tunnels, there is no evidence of females interacting with each other. [9]
Having many females in a nest is beneficial because all females have been observed to create tunnels to help weaken the rock and allow them to go through different tunnels to reach their own broods. [10] Additionally, there is a not a well-defined division of labor and there does not seem to be guards. [8]
Females typically collect pollen and nectar from the flowers Raphanus raphanistrum and Sinapis arvensis . The females carry the pollen on their hind tibia and hind femora. The nectar is carried internally back to the nests and more is carried later in the afternoon than in the morning. [7]
The scuttle fly Megaselia andrenae is a parasite that affects A. agilissima. It is a kleptoparasite, meaning that it steals food and lays its eggs in cells of A. agilissima and is active all day around the nesting sites. Many of the females attach themselves to the bees, while the males wait around outside the entrance to the nests for the bee to re-emerge with the female fly. [10]
Leucophora personata is another parasite that affects A. agilissima. These satellite flies are more active in the morning and sit close to the entrance of the host, eventually flying up to intercept the female bees coming into the tunnels. They then wait for the host to exit their nest and then they go into their cell to use up their nectar. If a bee notices that it is being followed, it moves in large zigzags to trick the fly away from its nest. If there is another bee in the tunnel, the fly will spend less time in the nest than it would if there was no other bee in the tunnel. This is beneficial for the bees to live communally since there is the chance that another bee will be at their tunnel discouraging the flies. [11]
Megachilidae is a cosmopolitan family of mostly solitary bees. Characteristic traits of this family are the restriction of their pollen-carrying structure to the ventral surface of the abdomen, and their typically elongated labrum. Megachilid genera are most commonly known as mason bees and leafcutter bees, reflecting the materials from which they build their nest cells ; a few collect plant or animal hairs and fibers, and are called carder bees, while others use plant resins in nest construction and are correspondingly called resin bees. All species feed on nectar and pollen, but a few are kleptoparasites, feeding on pollen collected by other megachilid bees. Parasitic species do not possess scopae. The motion of Megachilidae in the reproductive structures of flowers is energetic and swimming-like; this agitation releases large amounts of pollen.
Raphanus raphanistrum, also known as wild radish, white charlock or jointed charlock, is a flowering plant in the family Brassicaceae. One of its subspecies, Raphanus raphanistrum subsp. sativus, includes a diverse variety of cultivated radishes. The species is native to western Asia, Europe and parts of Northern Africa. It has been introduced into most parts of the world and is regarded as a habitat threatening invasive species in many areas, for example, Australia. It spreads rapidly and is often found growing on roadsides or in other places where the ground has been disturbed.
Habropoda laboriosa, the southeastern blueberry bee, is a bee in the family Apidae. It is native to the eastern United States. It is regarded as the most efficient pollinator of southern rabbiteye blueberries, because the flowers require buzz pollination, and H. laboriosa is one of the few bees that exhibit this behavior. It is active for only a few weeks of the year, while the blueberries are in flower during early spring, when the temperature is warm and humid. H. laboriosa are solitary bees that live alone but nest in close proximity with other nests of their species. They have similar features to bumble bees, but they are smaller in size compared to them. H. laboriosa are arthropods so they have segmented bodies that are composed of the head, thorax, and abdomen.
Xylocopa virginica, sometimes referred to as the eastern carpenter bee, extends through the eastern United States and into Canada. They are sympatric with Xylocopa micans in much of southeastern United States. They nest in various types of wood and eat pollen and nectar. In X. virginica, dominant females do not focus solely on egg-laying, as in other bee species considered to have "queens". Instead, dominant X. virginica females are responsible for a full gamut of activities including reproduction, foraging, and nest construction, whereas subordinate bees may engage in little activity outside of guarding the nest.
With over 850 species, the genus Nomada is one of the largest genera in the family Apidae, and the largest genus of cuckoo bees. Cuckoo bees are so named because they enter the nests of a host and lay eggs there, stealing resources that the host has already collected. The name "Nomada" is derived from the Greek word nomas, meaning "roaming" or "wandering."
Andrena is a genus of bees in the family Andrenidae. With over 1,500 species, it is one of the largest genera of animals. It is a strongly monophyletic group that is difficult to split into more manageable divisions; currently, Andrena is organized into 104 subgenera. It is nearly worldwide in distribution, with the notable exceptions of Oceania and South America. Bees in this genus are commonly known as mining bees due to their ground-nesting lifestyle.
The California carpenter bee, Xylocopa californica, is a species of carpenter bee in the order Hymenoptera, and it is native to western North America.
Eucera is a genus of bees in the family Apidae, which comprises more than 100 species. These bees are commonly known as long-horned bees due to their characteristically long antennae, especially in males. Eucera species can be found in diverse habitats, including meadows, fields, and urban gardens, primarily in the Palearctic and Nearctic regions, covering parts of Europe, Asia, North Africa, and North America.
Xylocopa sulcatipes is a large Arabian carpenter bee. These multivoltine bees take part in social nesting and cooperative nesting. They are metasocial carpenter bees that nest in thin dead branches. One or more cooperating females build many brood cells. They have been extensively studied in Saudi Arabia and Israel.
Xylocopa pubescens is a species of large carpenter bee. Females form nests by excavation with their mandibles, often in dead or soft wood. X. pubescens is commonly found in areas extending from India to Northeast and West Africa. It must reside in these warm climates because it requires a minimum ambient temperature of 18 °C (64 °F) in order to forage.
Macropis nuda is a ground nesting, univoltine bee native to northern parts of North America. Thus, this species cocoons as pupae and hibernates over the winter. The species is unusual as it is an oligolectic bee, foraging exclusively for floral oils and pollen from Primulaceae of the species Lysimachia ciliata.
Macrotera portalis is a species of communal, ground nesting, partially bivoltine bees found in arid grasslands and desert regions of North America. An oligolectic bee, M. portalis gathers pollen only from plants in the genus Sphaeralcea and has patterns of seasonal emergence to survive the harsh conditions of the desert, with emergence delayed until monsoon rains arrive.
Calliopsis is a genus of panurgine bees in the family Andrenidae. There are over 80 described species distributed throughout the western hemisphere.
Andrena scotica, the chocolate mining bee or hawthorn bee, is a species of mining bee from the family Andrenidae. It occurs in western Europe and is one of the most frequently encountered mining bees found in Great Britain, where it had been previously misidentified as Andrena carantonica.
Andrena barbilabris, the bearded miner bee, is a species of miner bee in the family Andrenidae. It is found in Europe and Northern Asia and North America.
Colletes validus, colloquially known as the blueberry cellophane bee, is a solitary, specialist bee in the family Colletidae. It is found primarily in eastern North America where it nests in sandy soils near ericaceous plants.
Andrena prunorum, otherwise known as the purple miner bee, is a species of solitary bees in the family Andrenidae. It is commonly found in the continental United States as well as much of North and Central America. Andrena prunorum is a spring-flying, ground-nesting bee that serves as a ubiquitous generalist in ecological settings. Both males and females live as prepupae in the winter in which they mate, and the females seek new sites for ground burrows. From there, they construct small cells surrounding a ball of pollen combined with nectar to nourish a laid egg before each cell is sealed, and the cycle begins anew. A. prunorum generally prefer the pollen derived from Rosaceae plants but will pollinate fruit trees if given the opportunity.
Leioproctus boltoni is a species of bee in the family of plasterer bees. This species was first described in 1904 and is endemic to New Zealand. They are a solitary bee, small and black in appearance. L. boltoni can be found throughout the main islands of New Zealand and forages on the flowers of both native and introduced species of plants. This species nests in the soil with their life cycle lasting approximately a year.
The tormentil mining bee is a species of mining bee from the family Andrenidae which has a Palearctic distribution.
Andrena helvola , the coppice mining bee, is a Palearctic species of mining bee from the genus Andrena.