期刊歸檔用於 2020年8月

2020年08月02日

NYBG EcoFlora August EcoQuest Challenge

The August EcoQuest Challenge is MONARCHS AND MILKWEEDS

Scientists estimate that Monarch Butterflies (Danaus plexippus) have declined by more than half since last year. From January through July, 2019, New Yorkers observed 201 Monarch Butterflies in the five boroughs. This year, only 133 have been observed (even though observations overall are up 6%). Milkweed plants (Asclepias) are the only food source for Monarch Butterfly caterpillars. How many can you find?

由使用者 danielatha danielatha2020年08月02日 12:43 所貼文 | 3 評論 | 留下評論