---
title: "Northern Blue"
description: "Plebejus idas — Insects & spiders. Plebejus idas, the Idas blue or northern blue, is a butterfly of the family Lycaenidae."
canonical: https://animalchecklist.com/animal/northern-blue
last_updated: 2026-09-20
---

# Northern Blue

> Plebejus idas — Insects & spiders. Plebejus idas, the Idas blue or northern blue, is a butterfly of the family Lycaenidae.

- Scientific name: *Plebejus idas*
- Category: `insects` (Insects & spiders)
- Habitats: unknown
- iNaturalist observations: 10496
- Wikidata: [Q1093306](https://www.wikidata.org/wiki/Q1093306)
- iNaturalist taxon: [130785](https://www.inaturalist.org/taxa/130785)

## Names

- en: Northern Blue
- de: Idas-Bläuling
- es: Niña Esmaltada
- fr: Azuré du genêt
- nl: Vals heideblauwtje
- pl: Modraszek idas

## Countries with the most observations

CA (2424), DE (1017), US (533), RU (439), FR (438), IT (290), DK (189), CH (166), FI (140), SE (138), ES (118), TR (61)

## Summary

Plebejus idas, the Idas blue or northern blue, is a butterfly of the family Lycaenidae. It belongs to the subfamily of Polyommatinae.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Plebejus_idas

## Photo

![Northern Blue](https://animalchecklist.com/img/animals/northern-blue/medium.jpg)

Photo: Kim Selbee · CC0 · inaturalist — https://www.inaturalist.org/observations/382762196

## Machine access

`GET https://animalchecklist.com/api/v1/animals/northern-blue?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).