|Queens (Danaus gilippus) were... not uncommon.|
|The controversial non-native tropical milkweed |
(Asclepias curassavica). The leaves are evergreen.
This is the best time to see butterflies down in south Texas' Rio Grande Valley. This area hits its peak butterfly density in October and November. The Rio Grande Valley is special. It marks the northern-most extent of number of largely tropical butterflies- a few of which I saw and will cover in a future post.
|The monarch butterfly|
Soldier butterflies are definitely the most uncommon of the three milkweed-feeders. Sometimes they stray into southern Arizona, but they primarily stick to the subtropical areas of the United States. They are the veritable four-leaf clover in the field. In addition to being distinguished from queens by their single (instead of double) line of white dots on the forewing, they also have a dusky dark patch in the middle of their hindwing. Overall, they are a rich shade of brown.
|The uncommon, hard to spot soldier butterfly|
So that's it! The three North American milkweed butterflies. Stay tuned for a more lengthy update on the other unusual species I found down on the border...