How to Use the Tables
Behind some of the crossings, percentages are presented: 100%, 50%, 25% and 33 1/3 %. Other percentages, however, are not given, as in such matters complicated theories must first be explained, such as crossing over type I and II. And because those percentages have no meaning for our tables-the correct results are only given behind the most important crossings-we will not go into these technical and often very complicated matters. In Table 1, for instance, you will find the crossing: dark green/white x light green/white; in other words: a crossing of two birds the first of which is dark green in external appearance (phenotype); the second bird light green; both however are split for the color white (or: carrying white as a recessive color). As all the given crossings in the tables are based on a percentage of 100 birds, it should be understood that this crossing only presents the possibility of obtaining a light green Budgie. But, also understandably, not for 100%, as you have a chance of getting young birds of the following colors as well:
1. dark green
2. light green/blue
3. dark green/blue
4. light green/yellow
5. dark green/yellow
6. light green/white
7. dark green/white
8. light yellow
9. dark yellow
10. light yellow/white
11. dark yellow/white
12. skyblue
13. cobalt
14. skyblue/white
15. cobalt/white
16. white/blue
17. white cobalt
Hence: together with the light green bird, eighteen (18) possibilities exist altogether. The following crossing: dark green/white x dark green/ white; gives no less than 27 possibilities, as, besides the 18 just given.
19. olive green
20. olive green/blue
21. olive green/yellow
22. olive green/white
23. olive yellow
24. olive yellow/white
25. mauve
26. mauve/white
27. white/mauve
The crossings with the given percentages present the quickest way to obtain the desired colors. From Table 3, for instance, it becomes obvious that all the young from light green x skyblue are for 100% light green/blue; the same applies when we pair a male skyblue with a light green hen. The second crossing of Table 3 is light green x cobalt; the outcome is 50% light green/ blue, and 50% dark green/ blue. The crossing dark green x light green/ yellow on the other hand presents only 25% dark green/yellow, and further 25% light green, 25% light green/yellow, and 25% dark green/yellow. A sample of crossing dark green x cobalt. Stated is that 33 1/3 % of this crossing will present dark green/ blue; the other possibilities are light green/blue, and olive green/blue, each, of course, for 33 1/3%.
YOU CAN USE THESE TABLES IN A DIFFERENT WAY AS WELL!
You have, for example, a pair of Budgerigars, one of which is light green, the other dark yellow. By checking ALL CROSSINGS light green x dark yellow in the tables you are able to find the outcome, as each table deals with only one given color. From the above crossing you may expect: 50% light green/yellow, and 50% dark green/yellow. A crossing of cobalt x light green/white will present the following possibilities:
1. light green/blue
2. dark green/blue.
Crossing dark yellow x dark yellow/white gives the following possibilities:
1. light yellow
2. dark yellow
3. olive yellow
4. light yellow/white
5. olive yellow/white
E-Mail: berniehansen@sympatico.ca
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