Chapter 8, Problem 1DA

To determine

The percentage of threatened breeding bird species as percent of total number of known breeding bird species by filling in the respective column in the given table.

Answer to Problem 1DA

The threatened breeding bird species are observed lowest (4.5 %) in Rwanda and highest (33.9%) in China.

Explanation of Solution

The percentage of threatened breeding bird species as percentage of total number of known breeding bird species will be calculated by taking the number of breeding bird species in 2002 and dividing that number by the total number of known breeding bird species from 1992 to 2002, and multiplying it by 100.

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in Afghanistan}=\frac{11}{181}\times 100\\ =6.077\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in Combodia}=\frac{19}{183}\times 100\\ =10.38\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in China}=\frac{74}{218}\times 100\\ =33.9\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in Costa Rica}=\frac{13}{279}\times 100\\ =4.6\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in Haiti}=\frac{14}{62}\times 100\\ =22.58\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in India}=\frac{72}{62}\times 100\\ =15.72\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in Rwanda}=\frac{9}{200}\times 100\\ =4.5\end{array}$

$\begin{array}{l}\text{Breeding bird species as percent of total-number of known-breeding bird- spcies }\\ \text{in United States}=\frac{55}{508}\times 100\\ =10.82\end{array}$

Country	Total Land Area in Square Kilometers (Square Miles)	Protected Area as Percent of Total Land Area (2003)	Total Number of Known Breeding Bird Species (1992–2002)	Number of Threatened Breeding Bird Species (2002)	Threatened Breeding Bird Species as percent of Total-number of Known-Breeding Bird- Spcies
Afghanistan	647,668 (250,000)	0.3	181	11	6.1
Cambodia	181,088 (69,900)	23.7	183	19	10.4
China	9,599,445 (3,705,386)	7.8	218	74	33.9
Costa Rica	51,114 (19,730)	23.4	279	13	4.7
Haiti	27,756 (10,714)	0.3	62	14	22.6
India	3,288,570 (1,269,388)	5.2	458	72	15.7
Rwanda	26,344 (10,169)	7.7	200	9	4.5
Unites States	9,633,915 (3,718,691)	15.8	508	55	10.8