Archivos de Diario para agosto 2022

02 de agosto de 2022

Who eats who?

Dragonflies are an important part of the food web in wetland ecosystems. As larva, they are ambush predators, eating many things, including other insect larvae, tadpoles and small fish. They are also prey, feeding larger aquatic wildlife like fish.

Dragonfly adults typically catch their prey while flying by grasping them with their legs. Various flies make up much of their diet, and they’ll eat each other, too. They are also capable of eating species larger than themselves. There is even evidence of a dragonfly eating a hummingbird.

Many predator-prey connections are well-known, like some of those listed above. Others may surprise you. Try our Who Eats Who wetland wildlife quiz to test your knowledge (and maybe learn something new)!

dragonfly being eaten by sparrows
A dragonfly being eaten by swallows, captured by anonymous_ebirder.

Anotado en 02 de agosto de 2022 a las 03:29 PM por e_ouimet e_ouimet | 2 comentarios | Deja un comentario

Qui mange qui?

Les libellules sont un élément essentiel de la chaîne alimentaire dans les écosystèmes des milieux humides. Les larves des libellules sont des prédateurs en embuscade qui dévorent tout : autres larves d’insectes, têtards et petits poissons. Les larves sont aussi des proies, qui nourrissent les gros prédateurs aquatiques comme les poissons.

Les libellules adultes attrapent généralement leurs proies en plein vol : elles les captent avec leurs pattes. Les différentes mouches constituent l’essentiel de leur régime alimentaire. Les libellules vont même jusqu’à s’entredévorer. Elles sont aussi capables de se nourrir d’espèces plus grosses qu’elles. On a même observé une libellule dévorer un colibri.

Les nombreux liens entre prédateurs et proies sont bien connus, comme ceux que nous avons évoqués ci dessus. D’autres pourraient vous étonner. Répondez à notre jeu questionnaire Qui mange qui sur la faune des milieux humides pour mettre à l’épreuve vos connaissances (et peut être apprendre des faits nouveaux)!

dragonfly being eaten by sparrows
anonymous_ebirder.

Anotado en 02 de agosto de 2022 a las 03:43 PM por e_ouimet e_ouimet | 0 comentarios | Deja un comentario

05 de agosto de 2022

Observation of the Week: Halloween pennant

This week's feature is a Halloween pennant, photographed and logged by iNaturalist user kathy_bill in Ontario. The Halloween pennant has been described as looking very similar to a butterfly. On hot days, it will often shade its thorax using its wings.

Show your support by liking and commenting on this Observation of the Week on Facebook, Twitter or Instagram, and follow us to learn more about Project Dragonfly and other iNaturalist projects.

Join the Project Dragonfly iNaturalist project now to celebrate dragonflies with us all summer long!

dragonfly by kathy_bill

Anotado en 05 de agosto de 2022 a las 02:03 PM por e_ouimet e_ouimet | 0 comentarios | Deja un comentario

12 de agosto de 2022

Observation of the Week: royal river cruiser

This week's feature is a royal river cruiser, photographed and logged by iNaturalist user burgbirder in southern Ontario. The royal river cruiser is a large dragonfly that likes to fly fast, low patrols over open water and sunny pathways.

Show your support by liking and commenting on this Observation of the Week on Facebook, Twitter or Instagram, and follow us to learn more about Project Dragonfly and other iNaturalist projects.

Join the Project Dragonfly iNaturalist project now to celebrate dragonflies with us all summer long!

dragonfly by burgbirder

Anotado en 12 de agosto de 2022 a las 02:40 PM por e_ouimet e_ouimet | 0 comentarios | Deja un comentario

19 de agosto de 2022

Observation of the Week: common green darner

This week's feature is a common green darner, photographed and logged by iNaturalist user joebartok in Ontario. The common green darner is one of 16 migratory dragonflies in North America. Like monarchs, these dragonflies embark on a multi-generational migration, where the generation that returns to Canada in spring are the grandchildren of the ones that left in autumn.

Show your support by liking and commenting on this Observation of the Week on Facebook, Twitter or Instagram, and follow us to learn more about Project Dragonfly and other iNaturalist projects.

Join the Project Dragonfly iNaturalist project now to celebrate dragonflies with us all summer long!

dragonfly by joebartok

Anotado en 19 de agosto de 2022 a las 05:18 PM por e_ouimet e_ouimet | 0 comentarios | Deja un comentario