City Species Stats - Introduced AND Native?

General
1

I’m trying to gather information about species observed in my city. It’s basically for event tabling, 'guess how many …’ kind of things.
Basically a table where I’m manually filtering for each category in turn, based on the iNat categories.

iNat categories
iNat categories303×130 10 KB

Species Count Introduced Threatened
Fish 67 8 8
Plants 1832 778 125
Fungi 743 19 22
Mammals 31 3 2
Amphibians 12 0 1
Reptiles 9 1 2
Insects 2918 270 148
Arachnids 201 31 7
Mollusks 68 19 12
Birds 14
All 6284 1179 398

When I filtered for Birds: ‘Introduced’ the results included Mallard, which has a tag of ‘N’ for Native. Most of the species have the ‘IN’ tag, but some have no tags.

London Birds - introduced or native
London Birds - introduced or native1077×796 197 KB

Does this mean that the Mallard is Native in Canada but Introduced in my city? I’m confused.

My questions:

  1. Where does the info for ‘Introduced’ and ‘Threatened’ come from? Presumably not the same place as the ‘N’ and ‘IN’ tags on the thumbnails?
  2. Has anyone already done any handy programming to collect this info automatically? (I’ve used the awesome sunburst charts, but the categories are not all at the same taxonomic level.)
2

Idk if this is the same issue, but I remember finding something labeled as Introduced on the species screen when it was native because it had two subspecies of conflicting native status

3

That’s my thinking, too. Anas platyrhynchos domesticus is certainly introduced in Canada.

4

Establishment means (introduced/native/endemic) come from the listings on the place checklists, which can be edited by anyone. Conservation statuses (threatened, endangered, etc.) have to be added by curators. Only establishment means show up on the thumbnails, and it depends on what you have your default place set to.

5

The 109 Mallard observations showing up here are the observations identified as “Domestic Mallard (Anas platyrhynchos domesticus)”. When removing the Introduced filter, 1,238 Mallard observations appear, which includes all the ones not identified to subspecies. The “Species” is native, hence the “N” but there are about 100 observations of a non-native subspecies, which is why it appears when filtered to “Introduced”.