July 2012-UF in Gainesville
Labels: assisted relocation, atala butterflies, butterflies, Citizen Science, Fairchild Tropical Botanical Garden, NABA, North American Butterfly Association, University of Florida
Dedicated to butterfly conservation in South Florida
Labels: assisted relocation, atala butterflies, butterflies, Citizen Science, Fairchild Tropical Botanical Garden, NABA, North American Butterfly Association, University of Florida
Because we live in an extremely urbanized environment, practically all of these sites could be labeled as “Urban Lots” and the differentiation between them may be very subtle and in some cases, subjective.
For example, several sites with atala activity were actually plant nurseries. I elected to identify most of those sites as “Public Parks” because they are accessible to the public and actually have quite a bit in common with parks! A few were designated as “Urban Lots,” however, because they are literally in the middle of a highly developed area.
| Public Parks | Urban Lots | Private Gardens | School Campuses | Preserves |
Palm Beach County | 12 | 6 | 8 | 2 | 0 |
Broward County | 15 | 6 | 35 | 6 | 1 |
Miami-Dade County | 25 | 1 | 10 | 2 | 3 |
In both Broward and Miami-Dade, the documented sites of atala activity are literally within a few miles of each other, and often within a few blocks of each other. It does not matter if the sites are public or private, but more that they are close to each other and contain the necessary ingredients for "happy hairstreaks.' I find that promising for future colony strength.
The map, which unfortunately I can’t show you on the blog, underlined some important inferences about the atala. First, private gardens are as important to the species' survival as we thought (Smith, 2000; Koi, 2008) Secondly, corridors are being used by the butterfly to self-establish in suitable habitat (that includes every one of the categories). Quite a few of the sites were self-established in the sense that no human assisted in their arrival, and all of these self-established ‘colonies’ were within a few miles of the closest known site.
Third, it was once proffered that the atala needed a “coastal” environment to thrive (Kilmer, 1992). Indeed, some of the most stable and prolific colonies have been near the coast. However, I think that perhaps this presumed ‘preference for the coast’ may have been an artifact of the environment. Until eighty years ago, the east coast of Florida was only six to ten miles wide. The Everglades was literally that close to the Atlantic Ocean, so everywhere in south east Florida was “coastal” to some extent. Southeast Florida has been drastically altered by canals, diminished wetlands, invasive vegetation and cities built on miles artificial landfilled territory. A question to consider now is, “How many miles from the ocean are still considered coastal?”
One of the surprising self-established colonies, in a National Wildlife Federation certified garden, showed up nearly 27 miles from the shore. It was also less than 8 miles from the Everglades. I think this further establishes that this species not only needs our gardens, it will seek out our gardens, and we are important in its survival!
Labels: atala butterflies, butterflies, Butterfly counts, Butterfly Migration, Fairchild Tropical Botanical Garden Butterfly Days, FNAI, imperiled butterflies, Schaus Butterfly, wildflowers