Elm Leafminer vs Birch Catkin Bug
Side-by-side species comparison
| Attribute | Elm Leafminer | Birch Catkin Bug |
|---|---|---|
| Scientific Name | Fenusa ulmi | Kleidocerys resedae |
| Order | Hymenoptera | Hemiptera |
| Family | Tenthredinidae | Lygaeidae |
| Size | 2.5-4 mm (adult) | 4-5 mm |
| Habitat | Woodlands | Woodlands |
| Diet | Herbivores | Seed Feeders |
| Regions | Europe, North America | Europe, northern Asia, North America |
| Conservation | Not Evaluated | Least Concern |
Elm Leafminer
A sawfly whose larvae mine between the upper and lower surfaces of elm leaves. Mines appear as blotchy brown patches on foliage.
Did You Know?
Each larva creates a single blotch mine that can expand to cover half the leaf.
Birch Catkin Bug
A small, oval brown seed bug that feeds on birch and alder catkins. It is very common in northern Europe and can form large swarms in autumn. It sometimes enters buildings in large numbers seeking overwintering shelter.
Did You Know?
In autumn, enormous swarms of thousands can descend on buildings near birch trees, alarming homeowners despite the bugs being completely harmless.